diff --git a/.circleci/config.yml b/.circleci/config.yml
index b433f85..476b7cc 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -20,7 +20,7 @@ jobs:
 
       - run:
           name: webpack and eslint
-          command: npm run dist
+          command: npm run build
 
       - run:
           name: Build .XPI
diff --git a/.eslintignore b/.eslintignore
index e69de29..8d6919b 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -0,0 +1,7 @@
+# do not lint/format generated artifacts
+dist/
+package-lock.json
+# makes sure that eslintrc.js gets linted/formatted
+!.eslintrc.js
+# don't lint/format package.json since npm install formats it differently by default
+package.json
diff --git a/.eslintrc.js b/.eslintrc.js
index c108f12..618576a 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,33 +1,52 @@
+/* eslint-env node */
+
 "use strict";
 
+// All Mozilla specific rules and environments at:
+// http://firefox-source-docs.mozilla.org/tools/lint/linters/eslint-plugin-mozilla.html
+
 module.exports = {
   env: {
-    "node": true
+    es6: true,
   },
   extends: [
     "eslint:recommended",
+    // list of rules at: https://dxr.mozilla.org/mozilla-central/source/tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js
     "plugin:mozilla/recommended",
   ],
-
-  plugins: [
-    "mozilla",
-    "json"
+  overrides: [
+    {
+      files: "src/**",
+      env: {
+        browser: true,
+        webextensions: true,
+      },
+    },
   ],
-
+  parserOptions: {
+    ecmaVersion: 8,
+    sourceType: "module",
+    ecmaFeatures: {
+      jsx: false,
+      experimentalObjectRestSpread: true,
+    },
+  },
+  plugins: ["json", "mozilla"],
+  root: true,
   rules: {
     "babel/new-cap": "off",
-    "comma-dangle": ["error", "always-multiline"],
-    "eqeqeq": "error",
-    "indent": ["warn", 2, {SwitchCase: 1}],
     "mozilla/no-aArgs": "warn",
-    "mozilla/balanced-listeners": 0,
+    "mozilla/balanced-listeners": "off",
+    "comma-dangle": ["error", "always-multiline"],
+    eqeqeq: "error",
+    indent: ["warn", 2, { SwitchCase: 1 }],
     "no-console": "warn",
-    "no-debugger": "warn",
-    "no-shadow": ["error"],
+    "no-var": "error",
+    "no-shadow": "error",
     "no-unused-vars": "error",
     "prefer-const": "warn",
-    "semi": ["error", "always"],
-    "require-jsdoc": "warn",
+    "prefer-spread": "error",
+    semi: ["error", "always"],
     "valid-jsdoc": "warn",
     "max-len": ["warn", 80],
   },
diff --git a/.gitignore b/.gitignore
index 10856d8..b75b390 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,3 @@ node_modules
 *.xpi
 *.tgz
 *.*.swp
-dist/
diff --git a/Dockerfile b/Dockerfile
index 86a8aeb..4c8425d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,4 +8,4 @@ RUN apt-get update -y && \
     apt-get install -y zip firefox xvfb nodejs xsel git ssh openbox && \
     npm install -g npm@5.3.0
 
-ENV PATH="/shield-study-utils/node_modules/.bin:$PATH"
+ENV PATH="/shield-study-addon-utils/node_modules/.bin:$PATH"
diff --git a/README.md b/README.md
index de6c45a..2638281 100644
--- a/README.md
+++ b/README.md
@@ -6,37 +6,24 @@
 
 [![Build Status](https://travis-ci.org/mozilla/shield-studies-addon-utils.svg?branch=master)](https://travis-ci.org/mozilla/shield-studies-addon-utils)
 
-A Firefox JavaScript module to be bundled with shield study add-ons (as `StudyUtils.jsm`). Provides these capabilities:
+APIs and tooling that allows add-on developers to build [Shield/Pioneer](https://wiki.mozilla.org/Firefox/Shield/Shield_Studies) ([Normandy](https://wiki.mozilla.org/Firefox/Shield#Normandy_-_User_Profile_Matching_and_Recipe_Deployment)) study add-ons efficiently.
 
-1.  **Suggest variation for a client** (Deterministically! i.e. based on a hash of non-PII user info, they will always get assigned to the same branch every time the study launches)
-2.  **Report study lifecycle data** using Telemetry
-3.  **Report feature interaction and success data** using Telemetry
-4.  **Registers/uregisters the study as an active experiment** (By annotating the Telemetry Environment, marking the user as special in the `main` ping).
-5.  **Validates schema for study config**
-6.  **Handles study endings** (endStudy method bundles lots of tasks in one, including appending survey URLs specified in Config.jsm with query strings/sending the user to a survey and uninstalling the add-on)
-
-The pings end up in the `shield-study` and `shield-study-addon` Telemetry buckets for faster analysis.
-
-Allows add-on developers to build [Shield Study](https://wiki.mozilla.org/Firefox/Shield/Shield_Studies) ([Normandy](https://wiki.mozilla.org/Firefox/Shield#Normandy_-_User_Profile_Matching_and_Recipe_Deployment)) compatible add-ons without having to think very much.
-
-## What You are Building
+## Overview
 
-* You are building a [legacy add-on](https://developer.mozilla.org/Add-ons/Legacy_add_ons). To deploy these after 57, you will need the magic special signing.
-* Shield study add-ons can not be based on Web Extensions [yet](https://github.com/mozilla/shield-studies-addon-utils/issues/45).
-* Jetpack / addon-sdk is not at all supported since v4 of this utils library.
+* `webExtensionApis` - Firefox WebExtension Experiments APIs providing capabilities for study add-ons that are yet not available in the built-in WebExtension APIs
+* `testUtils` - Test utils (helper classes to write functional/unit tests for your study add-on)
+* `examples` - Tested and verified example add-ons using the WebExtension Experiments APIs and test utils
 
 ## Get started
 
 Check out [mozilla/shield-studies-addon-template/](https://github.com/mozilla/shield-studies-addon-template/) to get started with an example study where shield-studies-addon-utils is already installed and configured.
 
-## Installing the `StudyUtils.jsm` in your add-on
+## Installing the utils in your add-on
 
 ```
-npm install --save-dev shield-studies-addon-utils
+npm install --save shield-studies-addon-utils
 ```
 
-Copy `dist/StudyUtils.jsm` to your `addon` source directory, where it will be zipped up.
-
 ## Engineering and Process
 
 * [Shield article on Mozilla Wiki](https://wiki.mozilla.org/Firefox/Shield)
@@ -46,24 +33,69 @@ Copy `dist/StudyUtils.jsm` to your `addon` source directory, where it will be zi
 * [Long, rambling engineering docs](./docs/engineering.md)
 * Come to slack: #shield
 
+## WebExtension APIs
+
+### `browser.study.*`
+
+Provides these capabilities:
+
+1.  **Suggest variation for a client** (Deterministically! i.e. based on a hash of non-PII user info, they will always get assigned to the same branch every time the study launches)
+2.  **Report study lifecycle data** using Telemetry
+3.  **Report feature interaction and success data** using Telemetry
+4.  **Registers/unregisters the study as an active experiment** (By annotating the Telemetry Environment, marking the user as special in the `main` ping).
+5.  **Validates schema for study config**
+6.  **Handles study endings** (endStudy method bundles lots of tasks in one, including appending survey URLs specified in Config.jsm with query strings/sending the user to a survey and uninstalling the add-on)
+
+To use, copy `webExtensionApis/study/api.js` and `webExtensionApis/study/schema.json` to your add-on's source directory under `privileged/study`, then add-the following to your add-on's manifest.json:
+
+```
+  "experiment_apis": {
+    "study": {
+      "schema": "./privileged/study/schema.json",
+      "parent": {
+        "scopes": ["addon_parent"],
+        "script": "./privileged/study/api.js",
+        "paths": [["study"]]
+      }
+    }
+  },
+```
+
+#### Data processing pipelines
+
+Depending on which data processing pipeline the study add-on is configured to use, the pings end up in different destinations:
+
+* `shield-parquet` - The pings end up in the `shield-study` and `shield-study-addon` Telemetry buckets for faster analysis.
+* `pioneer` - The pings are encrypted and end up in the Pioneer processing pipeline
+* `custom-telemetry-events` - The pings end up in the ordinary destination for custom telemetry events
+
+To use, copy and adjust the files as per the `study` API above.
+
+### `browser.prefs.*`
+
+Allows your web extension add-on to set and read preferences.
+
+## What You are Building
+
+* You are building . To deploy these after 57, you will need the magic special signing.
+* Shield study add-ons can not be based on Web Extensions [yet](https://github.com/mozilla/shield-studies-addon-utils/issues/45).
+
 ## Gotchas, Opinions, Side Effects, and Misfeatures
 
 1.  No handling of 'timers'. No saved state at all (including the variation name), unless you handle it yourself.
-
 2.  No 'running' pings in v4 (yet).
-
 3.  User disable also uninstalls (and cleans up).
 
 ## Development on the Utils
 
-* open an issue
-* hack and file a PR
+* Open an issue
+* Hack and file a PR
 
 ## History of major versions
 
-* v5: (In development) API exposed as a Web Extension Experiment
+* v5: (In development) API exposed as a Web Extension Experiment. Minimal viable add-on example added. Test coverage improved. Test utils added.
 * v4.1: Improved utils for common cases
-* v4: First `.jsm` release. Uses packet format for PACKET version 3.
+* v4: First `.jsm` release for shipping studies as [legacy add-ons](https://developer.mozilla.org/Add-ons/Legacy_add_ons). Used packet format for PACKET version 3. (Jetpack / addon-sdk is not at all supported since v4 of this utils library)
 * v3: Attempt to formalize on `shield-study` PACKET version 3. Jetpack based. Prototype used for `raymak/page-reload`. All work abandoned, and no formal npm release in this series. Work done at `v3-shield-packet-format` branch. LAST JETPACK (addon-sdk) RELEASE.
 * v2: Code refactor to es6 `class` with event models. Added cli tooling. Packet format is still arbitrary and per-study. Jetpack based. Last used in studies in Q2 2017.
 * v1: Initial work and thinking. Telemetry packets are rather arbitrary. Jetpack based.
@@ -72,6 +104,6 @@ Copy `dist/StudyUtils.jsm` to your `addon` source directory, where it will be zi
 
 Repositories that should not be used as templates for new studies:
 
-<https://github.com/gregglind/template-shield-study> - The incubation repo for the updated structure and contents of this repo, ported to the official template in late 2017.
-<https://github.com/benmiroglio/shield-study-embedded-webextension-hello-world-example> - A repository that was created in 2017 to help new Shield/Pioneer engineers to quickly get up and running with a Shield add-on, built upon an older and much more verbose add-on template. It's documentation has been ported to the official template repo.
-<https://github.com/johngruen/shield-template> - Despite its name, this repo is for static amo consent pages and does not contain any template for Shield studies
+* <https://github.com/gregglind/template-shield-study> - The incubation repo for the updated structure and contents of the template repo, ported to the official template in late 2017.
+* <https://github.com/benmiroglio/shield-study-embedded-webextension-hello-world-example> - A repository that was created in 2017 to help new Shield/Pioneer engineers to quickly get up and running with a Shield add-on, built upon an older and much more verbose add-on template. It's documentation has been ported to the official template repo.
+* <https://github.com/johngruen/shield-template> - Despite its name, this repo is for static amo consent pages and does not contain any template for Shield studies
diff --git a/bin/make_xpi.sh b/bin/make_xpi.sh
deleted file mode 100755
index 40a5e15..0000000
--- a/bin/make_xpi.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env bash
-cp dist/StudyUtils.jsm test-addon/
-
-set -eu
-
-BASE_DIR="$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")""/test-addon"
-TMP_DIR=$(mktemp -d)
-DEST="${TMP_DIR}/test-addon"
-mkdir -p $DEST
-
-# deletes the temp directory
-function cleanup {
-  rm -rf "$TMP_DIR"
-}
-trap cleanup EXIT
-
-while read -r LINE || [[ -n "${LINE}" ]]; do
-  mkdir -p "$(dirname "${DEST}/${LINE}")"
-  cp -r "${BASE_DIR}/${LINE}" "$(dirname "${DEST}/${LINE}")"
-done < "${BASE_DIR}/build-includes.txt"
-
-pushd $DEST
-zip -r test-addon.xpi *
-mv test-addon.xpi $BASE_DIR
-echo "created at: ${BASE_DIR}/test-addon.xpi"
-popd
diff --git a/examples/test-addon/bin/bundle-shield-studies-addon-utils.sh b/examples/test-addon/bin/bundle-shield-studies-addon-utils.sh
new file mode 100755
index 0000000..33d78fb
--- /dev/null
+++ b/examples/test-addon/bin/bundle-shield-studies-addon-utils.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+# fail on any error
+set -o errexit
+
+# always run from the repository root directory
+script_path=`dirname $0`
+cd "$script_path/../../../"
+
+# paths
+WEBEXTAPIS_PATH="webExtensionApis"
+ADDON_SRC_PATH="examples/test-addon/src"
+
+# bundle the study web extension experiment
+mkdir -p $ADDON_SRC_PATH/privileged/study
+cp $WEBEXTAPIS_PATH/study/api.js $ADDON_SRC_PATH/privileged/study/api.js
+cp $WEBEXTAPIS_PATH/study/schema.json $ADDON_SRC_PATH/privileged/study/schema.json
+
+# bundle the prefs web extension experiment
+mkdir -p $ADDON_SRC_PATH/privileged/prefs
+cp $WEBEXTAPIS_PATH/prefs/api.js $ADDON_SRC_PATH/privileged/prefs/api.js
+cp $WEBEXTAPIS_PATH/prefs/schema.json $ADDON_SRC_PATH/privileged/prefs/schema.json
diff --git a/examples/test-addon/dist/.gitignore b/examples/test-addon/dist/.gitignore
new file mode 100644
index 0000000..aca2417
--- /dev/null
+++ b/examples/test-addon/dist/.gitignore
@@ -0,0 +1,2 @@
+*
+!*.gitignore
diff --git a/examples/test-addon/src/background.js b/examples/test-addon/src/background.js
new file mode 100644
index 0000000..2ff5f72
--- /dev/null
+++ b/examples/test-addon/src/background.js
@@ -0,0 +1,84 @@
+/* eslint no-console:off */
+/* global studySetup */
+
+"use strict";
+
+class Study {
+  constructor(variation) {}
+
+  // Will run only during first install attempt
+  // Use web extension experiments to get whatever prefs, add-ons,
+  // telemetry, anything necessary for the check
+  static async isEligible() {
+    //browser.prefs.get('my.favorite.pref');
+    return true;
+  }
+
+  // Expiration checks should be implemented in a very reliable way by
+  // the add-on since Normandy does not handle study expiration in a reliable manner
+  static async hasExpired() {
+    return false;
+  }
+}
+
+/**
+ * Fired when the extension is first installed, when the extension is updated
+ * to a new version, and when the browser is updated to a new version.
+ * @param details
+ */
+function handleInstalled(details) {
+  console.log(
+    "The 'handleInstalled' event was fired.",
+    details.reason,
+    details,
+  );
+}
+
+/**
+ * Fired when a profile that has this extension installed first starts up.
+ * This event is not fired when a private browsing/incognito profile is started.
+ */
+async function handleStartup() {
+  console.log("The 'handleStartup' event was fired.", arguments);
+}
+
+// todo: on shutdown
+// Run shutdown-related non-privileged code
+
+browser.runtime.onStartup.addListener(handleStartup);
+browser.runtime.onInstalled.addListener(handleInstalled);
+
+async function initiateStudy() {
+  // Set dynamic study configuration flags
+  studySetup.eligible = await Study.isEligible();
+  studySetup.expired = await Study.hasExpired();
+  // Ensure we have configured study and are supposed to run our feature
+  await browser.study.configure(studySetup);
+  // Run the startup study checks
+  await browser.study.startup();
+  // Read the active study variation
+  const { variation } = await browser.study.info();
+  // Initiate our study-specific background logic
+  new Study(variation);
+}
+
+// Since this is a test-addon, we don't initiate any code directly, but wait
+// for events sent by tests. This allows us to control and test the execution
+// properly.
+browser.runtime.onMessage.addListener((request, sender, sendResponse) => {
+  console.log("request", request);
+  if (request === "test:initiateStudy") {
+    initiateStudy();
+  }
+});
+
+// The tests that probe the web extensions APIs directly rely on an extension
+// page opening up in a new window/tab.
+// For more information, see shield-studies-addon-utils/testUtils/executeJs.js
+const createData = {
+  type: "detached_panel",
+  url: "extension-page-for-tests/index.html",
+  width: 500,
+  height: 500,
+};
+const creating = browser.windows.create(createData);
diff --git a/examples/test-addon/src/extension-page-for-tests/index.html b/examples/test-addon/src/extension-page-for-tests/index.html
new file mode 100644
index 0000000..22c39b4
--- /dev/null
+++ b/examples/test-addon/src/extension-page-for-tests/index.html
@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
+    <link rel="stylesheet" type="text/css" href="chrome://browser/content/extension.css">
+    <style>
+
+        body {
+            margin: 1em;
+        }
+
+    </style>
+</head>
+<body>
+
+<h1>Shield Study Utils Test Add-on</h1>
+<p>This is an extension page for shield-studies-addon-utils/test-addon</p>
+
+<p>This add-on initiates no background logic on it's own, so that the tests
+    can test each lifecycle event in isolation.</p>
+
+<p>For manual testing, use the buttons below to run the code
+    corresponding to each lifecycle event.</p>
+
+<p>
+    <button id="initiateStudy-button" class="button-style">initiateStudy</button>
+</p>
+
+<script src="./page.js"></script>
+</body>
+</html>
diff --git a/examples/test-addon/src/extension-page-for-tests/page.js b/examples/test-addon/src/extension-page-for-tests/page.js
new file mode 100644
index 0000000..3e27ec9
--- /dev/null
+++ b/examples/test-addon/src/extension-page-for-tests/page.js
@@ -0,0 +1,9 @@
+document.addEventListener("click", async e => {
+  function handleError(error) {
+    console.error(error);
+  }
+
+  if (e.target.id === "initiateStudy-button") {
+    await browser.runtime.sendMessage("test:initiateStudy");
+  }
+});
diff --git a/examples/test-addon/src/icons/LICENSE b/examples/test-addon/src/icons/LICENSE
new file mode 100644
index 0000000..fcd8e26
--- /dev/null
+++ b/examples/test-addon/src/icons/LICENSE
@@ -0,0 +1 @@
+All icons are public domain and came from https://openclipart.org/.
diff --git a/examples/test-addon/src/icons/shield-icon.svg b/examples/test-addon/src/icons/shield-icon.svg
new file mode 100644
index 0000000..3ad3e5f
--- /dev/null
+++ b/examples/test-addon/src/icons/shield-icon.svg
@@ -0,0 +1,281 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+<svg
+    xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
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+    xmlns="http://www.w3.org/2000/svg"
+    xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+    xmlns:cc="http://creativecommons.org/ns#"
+    xmlns:xlink="http://www.w3.org/1999/xlink"
+    xmlns:dc="http://purl.org/dc/elements/1.1/"
+    xmlns:svg="http://www.w3.org/2000/svg"
+    xmlns:ns1="http://sozi.baierouge.fr"
+    id="svg2"
+    sodipodi:docname="Shield Icon.svg"
+    inkscape:export-filename="C:\Documents and Settings\Marrick\Desktop\Inkscape\Shield Icon.png"
+    viewBox="0 0 256 256"
+    inkscape:export-xdpi="90"
+    version="1.1"
+    inkscape:export-ydpi="90"
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+        width="1.24"
+        color-interpolation-filters="sRGB"
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+        x="-.12"
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+      >
+      <feGaussianBlur
+          id="feGaussianBlur3833"
+          stdDeviation="0.98473911"
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+    </filter
+    >
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+      >
+      <feGaussianBlur
+          id="feGaussianBlur3859"
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+          inkscape:collect="always"
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+    </filter
+    >
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+        gradientUnits="userSpaceOnUse"
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+  </defs
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+  <sodipodi:namedview
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+      <path
+          id="path3796"
+          d="m115.98 829.33c-24.989 0.31052-52.423 3.4545-81.247 10.572-0.41677 3.1287-2.6282 25.06-3.2608 55.08-0.52072 24.711 1.1027 52.644 6.8566 73.709 49.04-41.776 112.47-55.821 170.04-49.579 0.0521-3.7278 0.21233-20.512 0.1714-24.13-0.33954-30.037-3.3888-51.729-3.7711-54.853-24.885-5.8623-50.507-10.203-78.166-10.799-3.5032-0.0764-7.0579-0.0509-10.628 0z"
+          sodipodi:nodetypes="scsccsccs"
+          style="fill:url(#linearGradient3869)"
+          inkscape:connector-curvature="0"
+      />
+    </g
+    >
+  </g
+  >
+  <metadata
+    >
+    <rdf:RDF
+      >
+      <cc:Work
+        >
+        <dc:format
+          >image/svg+xml</dc:format
+        >
+        <dc:type
+            rdf:resource="http://purl.org/dc/dcmitype/StillImage"
+        />
+        <cc:license
+            rdf:resource="http://creativecommons.org/licenses/publicdomain/"
+        />
+        <dc:publisher
+          >
+          <cc:Agent
+              rdf:about="http://openclipart.org/"
+            >
+            <dc:title
+              >Openclipart</dc:title
+            >
+          </cc:Agent
+          >
+        </dc:publisher
+        >
+        <dc:title
+          >Shield Icon</dc:title
+        >
+        <dc:date
+          >2010-09-19T03:15:30</dc:date
+        >
+        <dc:description
+          >Here is an icon depicting a shield bearing a star. Use it to depict security, strength etc. Easily modifiable to incorporate a different emblem such as a sword. Enjoy!</dc:description
+        >
+        <dc:source
+          >https://openclipart.org/detail/85567/shield-icon-by-marricklip14</dc:source
+        >
+        <dc:creator
+          >
+          <cc:Agent
+            >
+            <dc:title
+              >marricklip14</dc:title
+            >
+          </cc:Agent
+          >
+        </dc:creator
+        >
+        <dc:subject
+          >
+          <rdf:Bag
+            >
+            <rdf:li
+              >Emblem</rdf:li
+            >
+            <rdf:li
+              >Icon Star</rdf:li
+            >
+            <rdf:li
+              >Security</rdf:li
+            >
+            <rdf:li
+              >Shield</rdf:li
+            >
+            <rdf:li
+              >Strength</rdf:li
+            >
+          </rdf:Bag
+          >
+        </dc:subject
+        >
+      </cc:Work
+      >
+      <cc:License
+          rdf:about="http://creativecommons.org/licenses/publicdomain/"
+        >
+        <cc:permits
+            rdf:resource="http://creativecommons.org/ns#Reproduction"
+        />
+        <cc:permits
+            rdf:resource="http://creativecommons.org/ns#Distribution"
+        />
+        <cc:permits
+            rdf:resource="http://creativecommons.org/ns#DerivativeWorks"
+        />
+      </cc:License
+      >
+    </rdf:RDF
+    >
+  </metadata
+  >
+</svg
+>
diff --git a/examples/test-addon/src/manifest.json b/examples/test-addon/src/manifest.json
new file mode 100644
index 0000000..7fb2753
--- /dev/null
+++ b/examples/test-addon/src/manifest.json
@@ -0,0 +1,41 @@
+{
+  "name": "Shield Utils Test Add-on",
+  "description": "Used for functional testing of shield-studies-addon-utils",
+  "version": "1.0.0",
+  "manifest_version": 2,
+  "applications": {
+    "gecko": {
+      "id": "shield-utils-test-addon@shield.mozilla.org",
+      "strict_min_version": "59.0"
+    }
+  },
+  "experiment_apis": {
+    "prefs": {
+      "schema": "./privileged/prefs/schema.json",
+      "parent": {
+        "scopes": ["addon_parent"],
+        "script": "./privileged/prefs/api.js",
+        "paths": [["prefs"]]
+      }
+    },
+    "study": {
+      "schema": "./privileged/study/schema.json",
+      "parent": {
+        "scopes": ["addon_parent"],
+        "script": "./privileged/study/api.js",
+        "paths": [["study"]]
+      }
+    }
+  },
+  "background": {
+    "scripts": ["studySetup.js", "background.js"]
+  },
+  "icons": {
+    "48": "icons/shield-icon.svg"
+  },
+  "browser_action": {
+    "browser_style": true,
+    "default_icon": "icons/shield-icon.svg",
+    "default_title": "Test"
+  }
+}
diff --git a/examples/test-addon/src/privileged/.gitignore b/examples/test-addon/src/privileged/.gitignore
new file mode 100644
index 0000000..3c31506
--- /dev/null
+++ b/examples/test-addon/src/privileged/.gitignore
@@ -0,0 +1,3 @@
+# ignore APIs that are bundled from shield-studies-addon-utils
+study/
+prefs/
diff --git a/examples/test-addon/src/studySetup.js b/examples/test-addon/src/studySetup.js
new file mode 100644
index 0000000..b000565
--- /dev/null
+++ b/examples/test-addon/src/studySetup.js
@@ -0,0 +1,83 @@
+const studySetup = {
+  study: {
+    /** Required for studyUtils.setup():
+     *
+     * - studyName
+     * - endings:
+     *   - map of endingName: configuration
+     * - telemetry
+     *   - boolean send
+     *   - boolean removeTestingFlag
+     *
+     * All other keys are optional.
+     */
+
+    // will be used activeExperiments tagging
+    studyName: "shield-utils-test",
+
+    /** **endings**
+     * - keys indicate the 'endStudy' even that opens these.
+     * - urls should be static (data) or external, because they have to
+     *   survive uninstall
+     * - If there is no key for an endStudy reason, no url will open.
+     * - usually surveys, orientations, explanations
+     */
+    endings: {
+      /** standard endings */
+      "user-disable": {
+        baseUrl: "http://www.example.com/?reason=user-disable",
+      },
+      ineligible: {
+        baseUrl: "http://www.example.com/?reason=ineligible",
+      },
+      expired: {
+        baseUrl: "http://www.example.com/?reason=expired",
+      },
+      /** User defined endings */
+      "used-often": {
+        baseUrl: "http://www.example.com/?reason=used-often",
+        study_state: "ended-positive", // neutral is default
+      },
+      "a-non-url-opening-ending": {
+        study_state: "ended-neutral",
+        baseUrl: null,
+      },
+      "introduction-leave-study": {
+        study_state: "ended-negative",
+        baseUrl: "http://www.example.com/?reason=introduction-leave-study",
+      },
+    },
+    telemetry: {
+      send: true, // assumed false. Actually send pings?
+      removeTestingFlag: false, // Marks pings to be discarded, set true for to have the pings processed in the pipeline
+      // TODO "onInvalid": "throw"  // invalid packet for schema?  throw||log
+    },
+  },
+
+  /* Button study branches and sample weights
+     - test kittens vs. puppies if we can only have one.
+       - downweight lizards.  Lizards is a 'poison' branch, meant to
+         help control for novelty effect
+  */
+  weightedVariations: [
+    {
+      name: "kittens",
+      weight: 1.5,
+    },
+    {
+      name: "puppers",
+      weight: 1.5,
+    },
+    {
+      name: "lizard",
+      weight: 1,
+    }, // we want more puppers in our sample
+  ],
+
+  /**
+   * Change this preference to be able to test the add-on behavior in different study
+   * variations/branches (or leave it unset to use the automatic assigning
+   * of a study variation/branch from weightedVariations in Config.jsm)
+   */
+  variationOverridePreference: "extensions.button_icon_preference.variation",
+};
diff --git a/examples/test-addon/test/functional/shield_utils_test.js b/examples/test-addon/test/functional/shield_utils_test.js
new file mode 100644
index 0000000..ed16e75
--- /dev/null
+++ b/examples/test-addon/test/functional/shield_utils_test.js
@@ -0,0 +1,270 @@
+/* eslint-env node, mocha */
+
+const assert = require("assert");
+const utils = require("./utils");
+const firefox = require("selenium-webdriver/firefox");
+const Context = firefox.Context;
+
+// TODO create new profile per test?
+// then we can test with a clean profile every time
+
+describe("Shield Study Add-on Utils Functional Tests", function() {
+  // This gives Firefox time to start, and us a bit longer during some of the tests.
+  this.timeout(15000);
+
+  let driver;
+
+  before(async () => {
+    driver = await utils.setup.promiseSetupDriver(utils.FIREFOX_PREFERENCES);
+    // install the addon (note: returns addon id)
+    await utils.setup.installAddon(driver);
+  });
+
+  // hint: skipping driver.quit() may be useful when debugging failed tests,
+  // leaving the browser open allowing inspection of the ui and browser logs
+  after(() => driver.quit());
+
+  it("should be able to access window.browser from the extension page for tests", async () => {
+    const hasAccessToWebExtensionApi = await utils.executeJs.executeAsyncScriptInExtensionPageForTests(
+      driver,
+      async callback => {
+        callback(typeof browser === "object");
+      },
+    );
+    assert(hasAccessToWebExtensionApi);
+  });
+
+  it("should be able to access study WebExtensions API from the extension page for tests", async () => {
+    const hasAccessToShieldUtilsWebExtensionApi = await utils.executeJs.executeAsyncScriptInExtensionPageForTests(
+      driver,
+      async callback => {
+        callback(browser && typeof browser.study === "object");
+      },
+    );
+    assert(hasAccessToShieldUtilsWebExtensionApi);
+  });
+
+  it("should return the correct variation based on specific weightedVariations", async () => {
+    const chosenVariation = await utils.executeJs.executeAsyncScriptInExtensionPageForTests(
+      driver,
+      async callback => {
+        const weightedVariations = [
+          {
+            name: "control",
+            weight: 1,
+          },
+          {
+            name: "kittens",
+            weight: 1.5,
+          },
+          {
+            name: "puppers",
+            weight: 2,
+          },
+        ];
+
+        const fraction = 0.3;
+        const variation = await browser.study.deterministicVariation(
+          weightedVariations,
+          fraction,
+        );
+
+        callback(variation);
+      },
+    );
+    assert(chosenVariation.name === "kittens");
+  });
+
+  it("telemetry should be working", async () => {
+    const shieldTelemetryPing = await driver.executeAsyncScript(
+      async callback => {
+        const { fakeSetup, getMostRecentPingsByType } = Components.utils.import(
+          "resource://test-addon/utils.jsm",
+          {},
+        );
+        const { studyUtils } = Components.utils.import(
+          "resource://test-addon/StudyUtils.jsm",
+          {},
+        );
+        Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
+
+        fakeSetup();
+
+        await studyUtils.telemetry({ foo: "bar" });
+
+        // TODO Fix this hackiness; caused by addClientId option in submitExternalPing
+        // The ping seems to be sending (appears in about:telemetry) but does not appear
+        // in the pings array
+        await new Promise(resolve => setTimeout(resolve, 1000));
+
+        const shieldPings = await getMostRecentPingsByType(
+          "shield-study-addon",
+        );
+        callback(shieldPings[0]);
+      },
+    );
+    assert(shieldTelemetryPing.payload.data.attributes.foo === "bar");
+  });
+
+  describe('test the library\'s "startup" process', function() {
+    it("should send the correct ping on first seen", async () => {
+      const firstSeenPing = await driver.executeAsyncScript(async callback => {
+        const { fakeSetup, getMostRecentPingsByType } = Components.utils.import(
+          "resource://test-addon/utils.jsm",
+          {},
+        );
+        const { studyUtils } = Components.utils.import(
+          "resource://test-addon/StudyUtils.jsm",
+          {},
+        );
+        Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
+
+        fakeSetup();
+
+        studyUtils.firstSeen();
+
+        const studyPings = await getMostRecentPingsByType("shield-study");
+        callback(studyPings[0]);
+      });
+      assert(firstSeenPing.payload.data.study_state === "enter");
+    });
+
+    it("should set the experiment to active in Telemetry", async () => {
+      const activeExperiments = await driver.executeAsyncScript(
+        async callback => {
+          const { fakeSetup } = Components.utils.import(
+            "resource://test-addon/utils.jsm",
+            {},
+          );
+          const { studyUtils } = Components.utils.import(
+            "resource://test-addon/StudyUtils.jsm",
+            {},
+          );
+          Components.utils.import(
+            "resource://gre/modules/TelemetryEnvironment.jsm",
+          );
+
+          fakeSetup();
+
+          studyUtils.setActive();
+
+          callback(TelemetryEnvironment.getActiveExperiments());
+        },
+      );
+      assert(activeExperiments.hasOwnProperty("shield-utils-test"));
+    });
+
+    it("should send the correct telemetry ping on first install", async () => {
+      const installedPing = await driver.executeAsyncScript(async callback => {
+        const { fakeSetup, getMostRecentPingsByType } = Components.utils.import(
+          "resource://test-addon/utils.jsm",
+          {},
+        );
+        const { studyUtils } = Components.utils.import(
+          "resource://test-addon/StudyUtils.jsm",
+          {},
+        );
+        Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
+
+        fakeSetup();
+
+        await studyUtils.startup({ reason: 5 }); // ADDON_INSTALL = 5
+
+        const studyPings = await getMostRecentPingsByType("shield-study");
+        callback(studyPings[0]);
+      });
+      assert(installedPing.payload.data.study_state === "installed");
+    });
+  });
+
+  describe("test the library's endStudy() function", function() {
+    before(async () => {
+      await driver.executeAsyncScript(async callback => {
+        const { fakeSetup } = Components.utils.import(
+          "resource://test-addon/utils.jsm",
+          {},
+        );
+        const { studyUtils } = Components.utils.import(
+          "resource://test-addon/StudyUtils.jsm",
+          {},
+        );
+
+        fakeSetup();
+
+        // TODO add tests for other reasons (?)
+        await studyUtils.endStudy({
+          reason: "expired",
+          fullname: "TEST_FULLNAME",
+        });
+        callback();
+      });
+    });
+
+    it("should set the experiment as inactive", async () => {
+      const activeExperiments = await driver.executeAsyncScript(
+        async callback => {
+          Components.utils.import(
+            "resource://gre/modules/TelemetryEnvironment.jsm",
+          );
+          callback(TelemetryEnvironment.getActiveExperiments());
+        },
+      );
+      assert(!activeExperiments.hasOwnProperty("shield-utils-test"));
+    });
+
+    describe("test the opening of an URL at the end of the study", function() {
+      it("should open a new tab", async () => {
+        const newTabOpened = await driver.wait(async () => {
+          const handles = await driver.getAllWindowHandles();
+          return handles.length === 2; // opened a new tab
+        }, 3000);
+        assert(newTabOpened);
+      });
+
+      it("should open a new tab to the correct URL", async () => {
+        const currentHandle = await driver.getWindowHandle();
+        driver.setContext(Context.CONTENT);
+        // Find the new window handle.
+        let newWindowHandle = null;
+        const handles = await driver.getAllWindowHandles();
+        for (const handle of handles) {
+          if (handle !== currentHandle) {
+            newWindowHandle = handle;
+          }
+        }
+        const correctURLOpened = await driver.wait(async () => {
+          await driver.switchTo().window(newWindowHandle);
+          const currentURL = await driver.getCurrentUrl();
+          return currentURL.startsWith(
+            "http://www.example.com/?reason=expired",
+          );
+        });
+        assert(correctURLOpened);
+      });
+    });
+
+    it("should send the correct reason telemetry", async () => {
+      const pings = await driver.executeAsyncScript(async callback => {
+        const { getMostRecentPingsByType } = Components.utils.import(
+          "resource://test-addon/utils.jsm",
+          {},
+        );
+        const studyPings = await getMostRecentPingsByType("shield-study");
+        callback(studyPings[1]); // ping before the most recent ping
+      });
+      assert(pings.payload.data.study_state === "expired");
+    });
+
+    it("should send the uninstall telemetry", async () => {
+      const pings = await driver.executeAsyncScript(async callback => {
+        const { getMostRecentPingsByType } = Components.utils.import(
+          "resource://test-addon/utils.jsm",
+          {},
+        );
+        const studyPings = await getMostRecentPingsByType("shield-study");
+        callback(studyPings[0]);
+      });
+      assert(pings.payload.data.study_state === "exit");
+    });
+  });
+});
diff --git a/examples/test-addon/test/functional/utils.js b/examples/test-addon/test/functional/utils.js
new file mode 100644
index 0000000..41a8e68
--- /dev/null
+++ b/examples/test-addon/test/functional/utils.js
@@ -0,0 +1,49 @@
+/* eslint-env node */
+
+// The geckodriver package downloads and installs geckodriver for us.
+// We use it by requiring it.
+require("geckodriver");
+
+// Preferences set during testing
+const FIREFOX_PREFERENCES = {
+  // Ensure e10s is turned on.
+  "browser.tabs.remote.autostart": true,
+  "browser.tabs.remote.autostart.1": true,
+  "browser.tabs.remote.autostart.2": true,
+
+  // Improve debugging using `browser toolbox`.
+  "devtools.chrome.enabled": true,
+  "devtools.debugger.remote-enabled": true,
+  "devtools.debugger.prompt-connection": false,
+
+  // Removing warning for `about:config`
+  "general.warnOnAboutConfig": false,
+
+  // Force variation for testing
+  "extensions.button_icon_preference.variation": "puppers",
+
+  /** WARNING: Geckodriver sets many additional prefs at:
+   * https://dxr.mozilla.org/mozilla-central/source/testing/geckodriver/src/prefs.rs
+   *
+   * In, particular, this DISABLES actual telemetry uploading
+   * ("toolkit.telemetry.server", Pref::new("https://%(server)s/dummy/telemetry/")),
+   *
+   */
+};
+
+// Re-usable test methods from shield-studies-addon-utils
+const { executeJs } = require("../../../../testUtils/executeJs");
+const { nav } = require("../../../../testUtils/nav");
+const { pings } = require("../../../../testUtils/pings");
+const { setup } = require("../../../../testUtils/setup");
+const { ui } = require("../../../../testUtils/ui");
+
+// What we expose to our add-on-specific tests
+module.exports = {
+  FIREFOX_PREFERENCES,
+  executeJs,
+  nav,
+  pings,
+  setup,
+  ui,
+};
diff --git a/examples/test-addon/web-ext-config.js b/examples/test-addon/web-ext-config.js
new file mode 100644
index 0000000..c6511df
--- /dev/null
+++ b/examples/test-addon/web-ext-config.js
@@ -0,0 +1,19 @@
+/* eslint-env node */
+
+const defaultConfig = {
+  // Global options:
+  sourceDir: "./src/",
+  artifactsDir: "./dist/",
+  ignoreFiles: [".DS_Store"],
+  // Command options:
+  build: {
+    overwriteDest: true,
+  },
+  run: {
+    firefox: "nightly",
+    browserConsole: true,
+    startUrl: ["about:debugging"],
+  },
+};
+
+module.exports = defaultConfig;
diff --git a/shield-study-helper-addon/addon/bootstrap.js b/misc/shield-study-helper-addon/addon/bootstrap.js
similarity index 74%
rename from shield-study-helper-addon/addon/bootstrap.js
rename to misc/shield-study-helper-addon/addon/bootstrap.js
index 7db1e9b..efcf49a 100644
--- a/shield-study-helper-addon/addon/bootstrap.js
+++ b/misc/shield-study-helper-addon/addon/bootstrap.js
@@ -3,15 +3,15 @@
 /* global  __SCRIPT_URI_SPEC__, Feature, studyUtils, config */
 /* eslint no-unused-vars: ["error", { "varsIgnorePattern": "(startup|shutdown|install|uninstall)" }]*/
 
-async function getTelemetryPings (options) {
+async function getTelemetryPings(options) {
   // type is String or Array
-  const {type, n, timestamp, headersOnly} = options;
+  const { type, n, timestamp, headersOnly } = options;
   Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
   // {type, id, timestampCreated}
   let pings = await TelemetryArchive.promiseArchivedPingList();
   if (type) {
     if (!(type instanceof Array)) {
-      type = [type];  // Array-ify if it's a string
+      type = [type]; // Array-ify if it's a string
     }
   }
   if (type) pings = pings.filter(p => type.includes(p.type));
@@ -19,23 +19,26 @@ async function getTelemetryPings (options) {
 
   pings.sort((a, b) => b.timestampCreated - a.timestampCreated);
   if (n) pings = pings.slice(0, n);
-  const pingData = headersOnly ? pings : pings.map(ping => TelemetryArchive.promiseArchivedPingById(ping.id));
-  return Promise.all(pingData)
+  const pingData = headersOnly
+    ? pings
+    : pings.map(ping => TelemetryArchive.promiseArchivedPingById(ping.id));
+  return Promise.all(pingData);
 }
 
-async function pingsReport () {
+async function pingsReport() {
   async function getPings() {
     const ar = ["shield-study", "shield-study-addon"];
-    return getTelemetryPings({type: ["shield-study", "shield-study-addon"]});
+    return getTelemetryPings({ type: ["shield-study", "shield-study-addon"] });
   }
 
   const pings = (await getPings()).reverse();
   if (pings.length == 0) {
-    return {"report": "No pings found"}
+    return { report: "No pings found" };
   }
   const p0 = pings[0].payload;
   // print common fields
-  const report = `
+  const report =
+    `
 // common fields
 
 branch        ${p0.branch}        // should describe Question text
@@ -43,20 +46,23 @@ study_name    ${p0.study_name}
 addon_version ${p0.addon_version}
 version       ${p0.version}
 
-` + pings.map((p,i)=>`${i} ${p.creationDate} ${p.payload.type}
-${JSON.stringify(p.payload.data,null,2)}
+` +
+    pings
+      .map(
+        (p, i) => `${i} ${p.creationDate} ${p.payload.type}
+${JSON.stringify(p.payload.data, null, 2)}
 
-`).join('\n');
+`,
+      )
+      .join("\n");
 
-  return {"report": report};
+  return { report: report };
   //pings.forEach(p=>{
   //  console.log(p.creationDate, p.payload.type);
   //  console.log(JSON.stringify(p.payload.data,null,2))
   //})
 }
 
-
-
 async function listenFromWebExtension(msg, sender, sendResponse) {
   //await pingsReport();
   console.log(`got ${msg}`);
@@ -76,12 +82,11 @@ async function listenFromWebExtension(msg, sender, sendResponse) {
   return false;
 }
 
-
 async function startup(addonData, reason) {
-  console.log('starting up debugger')
+  console.log("starting up debugger");
   const webExtension = addonData.webExtension;
   webExtension.startup().then(api => {
-    const {browser} = api;
+    const { browser } = api;
     // messages intended for shieldn:  {shield:true,msg=[info|endStudy|telemetry],data=data}
     browser.runtime.onMessage.addListener(listenFromWebExtension);
     //  other message handlers from your addon, if any
diff --git a/shield-study-helper-addon/addon/chrome.manifest b/misc/shield-study-helper-addon/addon/chrome.manifest
similarity index 100%
rename from shield-study-helper-addon/addon/chrome.manifest
rename to misc/shield-study-helper-addon/addon/chrome.manifest
diff --git a/shield-study-helper-addon/addon/install.rdf b/misc/shield-study-helper-addon/addon/install.rdf
similarity index 100%
rename from shield-study-helper-addon/addon/install.rdf
rename to misc/shield-study-helper-addon/addon/install.rdf
diff --git a/misc/shield-study-helper-addon/addon/webextension/.eslintrc.json b/misc/shield-study-helper-addon/addon/webextension/.eslintrc.json
new file mode 100644
index 0000000..5c7cc9e
--- /dev/null
+++ b/misc/shield-study-helper-addon/addon/webextension/.eslintrc.json
@@ -0,0 +1,11 @@
+{
+  "env": {
+    "browser": true,
+    "es6": true,
+    "webextensions": true
+  },
+  "extends": ["eslint:recommended"],
+  "rules": {
+    "no-console": "warn"
+  }
+}
diff --git a/shield-study-helper-addon/addon/webextension/icon.png b/misc/shield-study-helper-addon/addon/webextension/icon.png
similarity index 100%
rename from shield-study-helper-addon/addon/webextension/icon.png
rename to misc/shield-study-helper-addon/addon/webextension/icon.png
diff --git a/shield-study-helper-addon/addon/webextension/manifest.json b/misc/shield-study-helper-addon/addon/webextension/manifest.json
similarity index 100%
rename from shield-study-helper-addon/addon/webextension/manifest.json
rename to misc/shield-study-helper-addon/addon/webextension/manifest.json
diff --git a/shield-study-helper-addon/addon/webextension/qa.html b/misc/shield-study-helper-addon/addon/webextension/qa.html
similarity index 100%
rename from shield-study-helper-addon/addon/webextension/qa.html
rename to misc/shield-study-helper-addon/addon/webextension/qa.html
diff --git a/shield-study-helper-addon/addon/webextension/qa.js b/misc/shield-study-helper-addon/addon/webextension/qa.js
similarity index 63%
rename from shield-study-helper-addon/addon/webextension/qa.js
rename to misc/shield-study-helper-addon/addon/webextension/qa.js
index ef036a1..d9f3142 100644
--- a/shield-study-helper-addon/addon/webextension/qa.js
+++ b/misc/shield-study-helper-addon/addon/webextension/qa.js
@@ -7,26 +7,25 @@ has a bunch of pings and stuff
 
 `;
 
-function printReport (text) {
+function printReport(text) {
   console.log(`about to replace: ${text}`);
-  document.querySelector('#timestamp').textContent=`${new Date()}`;
-  document.querySelector('#qa').textContent=text;
+  document.querySelector("#timestamp").textContent = `${new Date()}`;
+  document.querySelector("#qa").textContent = text;
 }
 
-
-async function tryReportFromFirefox () {
-  console.log(`has browser runtime? ${browser.runtime}`)
+async function tryReportFromFirefox() {
+  console.log(`has browser runtime? ${browser.runtime}`);
   if (browser.runtime) {
-    const reply = await browser.runtime.sendMessage("qa-report")
+    const reply = await browser.runtime.sendMessage("qa-report");
     console.log("got reply!", reply);
     if (reply) {
       printReport(reply.report);
       //console.log("response from legacy add-on: " + reply.content);
-    };
+    }
   }
 }
 
-function startup () {
+function startup() {
   printReport(PLACEHOLDER);
   console.log("asking firefox");
   tryReportFromFirefox();
@@ -39,5 +38,4 @@ page starts up.
 - once it arrives, insert it.
 */
 
-
-document.addEventListener('DOMContentLoaded', startup);
+document.addEventListener("DOMContentLoaded", startup);
diff --git a/shield-study-helper-addon/build.sh b/misc/shield-study-helper-addon/build.sh
similarity index 100%
rename from shield-study-helper-addon/build.sh
rename to misc/shield-study-helper-addon/build.sh
diff --git a/shield-study-helper-addon/package-lock.json b/misc/shield-study-helper-addon/package-lock.json
similarity index 100%
rename from shield-study-helper-addon/package-lock.json
rename to misc/shield-study-helper-addon/package-lock.json
diff --git a/shield-study-helper-addon/package.json b/misc/shield-study-helper-addon/package.json
similarity index 100%
rename from shield-study-helper-addon/package.json
rename to misc/shield-study-helper-addon/package.json
diff --git a/shield-study-helper-addon/run-firefox.js b/misc/shield-study-helper-addon/run-firefox.js
similarity index 88%
rename from shield-study-helper-addon/run-firefox.js
rename to misc/shield-study-helper-addon/run-firefox.js
index c784775..0307240 100644
--- a/shield-study-helper-addon/run-firefox.js
+++ b/misc/shield-study-helper-addon/run-firefox.js
@@ -10,7 +10,6 @@
 
 console.log("Starting up firefox");
 
-
 require("geckodriver");
 const firefox = require("selenium-webdriver/firefox");
 const cmd = require("selenium-webdriver/lib/command");
@@ -60,11 +59,11 @@ async function promiseActualBinary(binary) {
   }
 }
 
-promiseSetupDriver = async() => {
+promiseSetupDriver = async () => {
   const profile = new firefox.Profile();
 
   // TODO, allow 'actually send telemetry' here.
-  Object.keys(FIREFOX_PREFERENCES).forEach((key) => {
+  Object.keys(FIREFOX_PREFERENCES).forEach(key => {
     profile.setPreference(key, FIREFOX_PREFERENCES[key]);
   });
 
@@ -76,7 +75,9 @@ promiseSetupDriver = async() => {
     .forBrowser("firefox")
     .setFirefoxOptions(options);
 
-  const binaryLocation = await promiseActualBinary(process.env.FIREFOX_BINARY || "nightly");
+  const binaryLocation = await promiseActualBinary(
+    process.env.FIREFOX_BINARY || "nightly",
+  );
   await options.setBinary(new firefox.Binary(binaryLocation));
   const driver = await builder.build();
   // Firefox will be started up by now
@@ -85,21 +86,28 @@ promiseSetupDriver = async() => {
   return driver;
 };
 
-installAddon = async(driver, fileLocation) => {
+installAddon = async (driver, fileLocation) => {
   // references:
   //    https://bugzilla.mozilla.org/show_bug.cgi?id=1298025
   //    https://github.com/mozilla/geckodriver/releases/tag/v0.17.0
   const executor = driver.getExecutor();
-  executor.defineCommand("installAddon", "POST", "/session/:sessionId/moz/addon/install");
+  executor.defineCommand(
+    "installAddon",
+    "POST",
+    "/session/:sessionId/moz/addon/install",
+  );
   const installCmd = new cmd.Command("installAddon");
 
   const session = await driver.getSession();
-  installCmd.setParameters({ sessionId: session.getId(), path: fileLocation, temporary: true });
+  installCmd.setParameters({
+    sessionId: session.getId(),
+    path: fileLocation,
+    temporary: true,
+  });
   return executor.execute(installCmd);
 };
 
-
-(async() => {
+(async () => {
   try {
     const driver = await promiseSetupDriver();
 
@@ -114,7 +122,6 @@ installAddon = async(driver, fileLocation) => {
     // navigate to a regular page
     driver.setContext(Context.CONTENT);
     driver.get("about:debugging");
-
   } catch (e) {
     console.error(e); // eslint-disable-line no-console
   }
diff --git a/package-lock.json b/package-lock.json
index 935845d..d90dc94 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,55 @@
 {
   "name": "shield-studies-addon-utils",
-  "version": "4.0.0",
+  "version": "5.0.0-alpha1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@cliqz-oss/firefox-client": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/@cliqz-oss/firefox-client/-/firefox-client-0.3.1.tgz",
+      "integrity": "sha512-RO+Tops/wGnBzWoZYkCraqyh2JqOejqJq5/a4b54HhmjTNSKdUPwAOK17EGg/zPb0nWqkuB7QyZsI9bo+ev8Kw==",
+      "dev": true,
+      "requires": {
+        "colors": "0.5.1",
+        "js-select": "0.6.0"
+      },
+      "dependencies": {
+        "colors": {
+          "version": "0.5.1",
+          "resolved": "https://registry.npmjs.org/colors/-/colors-0.5.1.tgz",
+          "integrity": "sha1-fQAj6usVTo7p/Oddy5I9DtFmd3Q=",
+          "dev": true
+        }
+      }
+    },
+    "@cliqz-oss/node-firefox-connect": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/@cliqz-oss/node-firefox-connect/-/node-firefox-connect-1.2.1.tgz",
+      "integrity": "sha512-O/IyiB5pfztCdmxQZg0/xeq5w+YiP3gtJz8d4We2EpLPKzbDVjOrtfLKYgVfm6Ya6mbvDge1uLkSRwaoVCWKnA==",
+      "dev": true,
+      "requires": {
+        "@cliqz-oss/firefox-client": "0.3.1",
+        "es6-promise": "2.3.0"
+      }
+    },
+    "@types/node": {
+      "version": "9.6.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-9.6.1.tgz",
+      "integrity": "sha512-xwlHq5DXQFRpe+u6hmmNkzYk/3oxxqDp71a/AJMupOQYmxyaBetqrVMqdNlSQfbg7XTJYD8vARjf3Op06OzdtQ==",
+      "dev": true
+    },
+    "JSONSelect": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/JSONSelect/-/JSONSelect-0.2.1.tgz",
+      "integrity": "sha1-QVQYpSbTP+MddLTe+jyDbUhewgM=",
+      "dev": true
+    },
+    "abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
+      "dev": true
+    },
     "acorn": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.1.1.tgz",
@@ -44,10 +90,446 @@
         }
       }
     },
+    "adbkit": {
+      "version": "2.11.0",
+      "resolved": "https://registry.npmjs.org/adbkit/-/adbkit-2.11.0.tgz",
+      "integrity": "sha512-j2vUhEeZmCiqBP+p77CpPWQTcT20rOmSmRHFUTZUwUpxzeCd3fXop4NAGYztSY9/FNU4bT/qqvYQ4EZKuCXhfA==",
+      "dev": true,
+      "requires": {
+        "adbkit-logcat": "1.1.0",
+        "adbkit-monkey": "1.0.1",
+        "bluebird": "2.9.34",
+        "commander": "2.11.0",
+        "debug": "2.6.8",
+        "node-forge": "0.7.5",
+        "split": "0.3.3"
+      },
+      "dependencies": {
+        "bluebird": {
+          "version": "2.9.34",
+          "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-2.9.34.tgz",
+          "integrity": "sha1-L3tOyAIWMoqf3evfacjUlC/v99g=",
+          "dev": true
+        }
+      }
+    },
+    "adbkit-logcat": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/adbkit-logcat/-/adbkit-logcat-1.1.0.tgz",
+      "integrity": "sha1-Adf5sM75CTowvLOwB+//MBUIli8=",
+      "dev": true
+    },
+    "adbkit-monkey": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/adbkit-monkey/-/adbkit-monkey-1.0.1.tgz",
+      "integrity": "sha1-8pG+cBou/FZ6Y/x6pq/N7TFDC+E=",
+      "dev": true,
+      "requires": {
+        "async": "0.2.10"
+      },
+      "dependencies": {
+        "async": {
+          "version": "0.2.10",
+          "resolved": "https://registry.npmjs.org/async/-/async-0.2.10.tgz",
+          "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E=",
+          "dev": true
+        }
+      }
+    },
+    "addons-linter": {
+      "version": "0.41.0",
+      "resolved": "https://registry.npmjs.org/addons-linter/-/addons-linter-0.41.0.tgz",
+      "integrity": "sha512-jrN8OC6HKWv6nadJYOWH/ISiuJrTzBp0Jonfg7xUBPTSo6Lxo/EWBv1s3mSGTErzhiODDAFFsP6QUr76QwfcWA==",
+      "dev": true,
+      "requires": {
+        "ajv": "6.3.0",
+        "ajv-merge-patch": "3.0.0",
+        "babel-register": "6.26.0",
+        "chalk": "2.3.2",
+        "cheerio": "1.0.0-rc.2",
+        "columnify": "1.5.4",
+        "common-tags": "1.7.2",
+        "crx-parser": "0.1.2",
+        "deepmerge": "2.1.0",
+        "dispensary": "0.16.0",
+        "doctoc": "1.3.1",
+        "es6-promisify": "5.0.0",
+        "eslint": "4.19.0",
+        "eslint-plugin-no-unsafe-innerhtml": "1.0.16",
+        "esprima": "3.1.3",
+        "first-chunk-stream": "2.0.0",
+        "fluent-syntax": "0.6.6",
+        "glob": "7.1.2",
+        "is-mergeable-object": "1.1.0",
+        "jed": "1.1.1",
+        "os-locale": "2.1.0",
+        "pino": "4.14.0",
+        "po2json": "0.4.5",
+        "postcss": "6.0.19",
+        "probe-image-size": "4.0.0",
+        "relaxed-json": "1.0.1",
+        "semver": "5.5.0",
+        "shelljs": "0.8.1",
+        "snyk": "1.70.3",
+        "source-map-support": "0.5.4",
+        "strip-bom-stream": "3.0.0",
+        "tosource": "1.0.0",
+        "upath": "1.0.4",
+        "whatwg-url": "6.3.0",
+        "xmldom": "0.1.27",
+        "yargs": "11.0.0",
+        "yauzl": "2.9.1"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "5.5.3",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz",
+          "integrity": "sha512-jd5MkIUlbbmb07nXH0DT3y7rDVtkzDi4XZOUVWAer8ajmF/DTSSbl5oNFyDOl/OXA33Bl79+ypHhl2pN20VeOQ==",
+          "dev": true
+        },
+        "ajv": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.3.0.tgz",
+          "integrity": "sha1-FlCkERTvAFdMrBC4Ay2PTBSBLac=",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "1.0.0",
+            "fast-json-stable-stringify": "2.0.0",
+            "json-schema-traverse": "0.3.1"
+          }
+        },
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "1.9.0"
+          }
+        },
+        "camelcase": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
+          "dev": true
+        },
+        "chalk": {
+          "version": "2.3.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.2.tgz",
+          "integrity": "sha512-ZM4j2/ld/YZDc3Ma8PgN7gyAk+kHMMMyzLNryCPGhWrsfAuDVeuid5bpRFTDgMH9JBK2lA4dyyAkkZYF/WcqDQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "3.2.1",
+            "escape-string-regexp": "1.0.5",
+            "supports-color": "5.3.0"
+          }
+        },
+        "cliui": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-4.0.0.tgz",
+          "integrity": "sha512-nY3W5Gu2racvdDk//ELReY+dHjb9PlIcVDFXP72nVIhq2Gy3LuVXYwJoPVudwQnv1shtohpgkdCKT2YaKY0CKw==",
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+          "dev": true
+        },
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+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
+          "integrity": "sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=",
+          "dev": true
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+          "dev": true,
+          "requires": {
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+            "array-unique": "0.3.2",
+            "braces": "2.3.1",
+            "define-property": "2.0.2",
+            "extend-shallow": "3.0.2",
+            "extglob": "2.0.4",
+            "fragment-cache": "0.2.1",
+            "kind-of": "6.0.2",
+            "nanomatch": "1.2.9",
+            "object.pick": "1.3.0",
+            "regex-not": "1.0.2",
+            "snapdragon": "0.8.2",
+            "to-regex": "3.0.2"
+          }
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+          "integrity": "sha1-vjX1Qlvh9/bHRxhPmKeIy5lHfuA=",
+          "dev": true,
+          "requires": {
+            "error-ex": "1.3.1",
+            "json-parse-better-errors": "1.0.2"
+          }
+        },
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+          "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
+          "integrity": "sha512-jRCJlojKnZ3addtTOjdIqoRuPEKBvNXcGYqzO6zWZX8KfKEpnGY5jfggJQ3EjKuu8D4bJRr0y+cYJFmYbImXGw==",
+          "dev": true,
+          "requires": {
+            "os-tmpdir": "1.0.2"
+          }
+        },
+        "watchpack": {
+          "version": "1.5.0",
+          "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-1.5.0.tgz",
+          "integrity": "sha512-RSlipNQB1u48cq0wH/BNfCu1tD/cJ8ydFIkNYhp9o+3d+8unClkIovpW5qpFPgmL9OE48wfAnlZydXByWP82AA==",
+          "dev": true,
+          "requires": {
+            "chokidar": "2.0.3",
+            "graceful-fs": "4.1.11",
+            "neo-async": "2.5.0"
+          }
         }
       }
     },
-    "url-parse-lax": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-1.0.0.tgz",
-      "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
-      "requires": {
-        "prepend-http": "1.0.4"
-      }
-    },
-    "util": {
-      "version": "0.10.3",
-      "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
-      "integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
-      "requires": {
-        "inherits": "2.0.1"
-      },
-      "dependencies": {
-        "inherits": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz",
-          "integrity": "sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE="
-        }
-      }
-    },
-    "util-deprecate": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
-    },
-    "validate-npm-package-license": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz",
-      "integrity": "sha1-KAS6vnEq0zeUWaz74kdGqywwP7w=",
-      "dev": true,
-      "requires": {
-        "spdx-correct": "1.0.2",
-        "spdx-expression-parse": "1.0.4"
-      }
-    },
-    "vm-browserify": {
-      "version": "0.0.4",
-      "resolved": "https://registry.npmjs.org/vm-browserify/-/vm-browserify-0.0.4.tgz",
-      "integrity": "sha1-XX6kW7755Kb/ZflUOOCofDV9WnM=",
-      "dev": true,
-      "requires": {
-        "indexof": "0.0.1"
-      }
-    },
-    "watchpack": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-1.3.1.tgz",
-      "integrity": "sha1-fYaTkHsozmAT5/NhCqKhrPB9rYc=",
-      "dev": true,
-      "requires": {
-        "async": "2.5.0",
-        "chokidar": "1.7.0",
-        "graceful-fs": "4.1.11"
-      }
+    "webidl-conversions": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
+      "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==",
+      "dev": true
     },
     "webpack": {
       "version": "2.7.0",
@@ -4286,15 +11142,28 @@
         "source-map": "0.5.6"
       }
     },
+    "whatwg-url": {
+      "version": "6.3.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-6.3.0.tgz",
+      "integrity": "sha512-rM+hE5iYKGPAOu05mIdJR47pYSR2vDzfrTEFRc/S8D3L60yW8BuXmUJ7Kog7x/DrokFN7JNaHKadpzjouKRRAw==",
+      "dev": true,
+      "requires": {
+        "lodash.sortby": "4.7.0",
+        "tr46": "1.0.1",
+        "webidl-conversions": "4.0.2"
+      }
+    },
     "when": {
       "version": "3.7.7",
       "resolved": "https://registry.npmjs.org/when/-/when-3.7.7.tgz",
-      "integrity": "sha1-q6A/w7tzbWyIsJHQE9io5ZDYRxg="
+      "integrity": "sha1-q6A/w7tzbWyIsJHQE9io5ZDYRxg=",
+      "dev": true
     },
     "which": {
       "version": "1.2.4",
       "resolved": "https://registry.npmjs.org/which/-/which-1.2.4.tgz",
       "integrity": "sha1-FVf5YIBgTlsRs1meufRbUKnv1yI=",
+      "dev": true,
       "requires": {
         "is-absolute": "0.1.7",
         "isexe": "1.1.2"
@@ -4306,6 +11175,46 @@
       "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8=",
       "dev": true
     },
+    "widest-line": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-1.0.0.tgz",
+      "integrity": "sha1-DAnIXCqUaD0Nfq+O4JfVZL8OEFw=",
+      "dev": true,
+      "requires": {
+        "string-width": "1.0.2"
+      },
+      "dependencies": {
+        "is-fullwidth-code-point": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "dev": true,
+          "requires": {
+            "number-is-nan": "1.0.1"
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
+          "requires": {
+            "code-point-at": "1.1.0",
+            "is-fullwidth-code-point": "1.0.0",
+            "strip-ansi": "3.0.1"
+          }
+        }
+      }
+    },
+    "win-release": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/win-release/-/win-release-1.1.1.tgz",
+      "integrity": "sha1-X6VeAr58qTTt/BJmVjLoSbcuUgk=",
+      "dev": true,
+      "requires": {
+        "semver": "5.3.0"
+      }
+    },
     "window-size": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
@@ -4315,7 +11224,8 @@
     "winreg": {
       "version": "0.0.12",
       "resolved": "https://registry.npmjs.org/winreg/-/winreg-0.0.12.tgz",
-      "integrity": "sha1-BxBVVLoanQiXklHRKUdb/64wBrc="
+      "integrity": "sha1-BxBVVLoanQiXklHRKUdb/64wBrc=",
+      "dev": true
     },
     "wordwrap": {
       "version": "1.0.0",
@@ -4358,7 +11268,8 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
     },
     "write": {
       "version": "0.2.1",
@@ -4369,10 +11280,31 @@
         "mkdirp": "0.5.1"
       }
     },
+    "write-file-atomic": {
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-1.3.4.tgz",
+      "integrity": "sha1-+Aek8LHZ6ROuekgRLmzDrxmRtF8=",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "4.1.11",
+        "imurmurhash": "0.1.4",
+        "slide": "1.1.6"
+      }
+    },
+    "xdg-basedir": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-2.0.0.tgz",
+      "integrity": "sha1-7byQPMOF/ARSPZZqM1UEtVBNG9I=",
+      "dev": true,
+      "requires": {
+        "os-homedir": "1.0.2"
+      }
+    },
     "xml2js": {
       "version": "0.4.17",
       "resolved": "https://registry.npmjs.org/xml2js/-/xml2js-0.4.17.tgz",
       "integrity": "sha1-F76T6q4/O3eTWceVtBlwWogX6Gg=",
+      "dev": true,
       "requires": {
         "sax": "1.2.4",
         "xmlbuilder": "4.2.1"
@@ -4382,10 +11314,23 @@
       "version": "4.2.1",
       "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-4.2.1.tgz",
       "integrity": "sha1-qlijBBoGb5DqoWwvU4n/GfP0YaU=",
+      "dev": true,
       "requires": {
         "lodash": "4.17.4"
       }
     },
+    "xmldom": {
+      "version": "0.1.27",
+      "resolved": "https://registry.npmjs.org/xmldom/-/xmldom-0.1.27.tgz",
+      "integrity": "sha1-1QH5ezvbQDr4757MIFcxh6rawOk=",
+      "dev": true
+    },
+    "xregexp": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/xregexp/-/xregexp-4.0.0.tgz",
+      "integrity": "sha512-PHyM+sQouu7xspQQwELlGwwd05mXUFqwFYfqPO0cC7x4fxyHnnuetmQr6CjJiafIDoH4MogHb9dOoJzR/Y4rFg==",
+      "dev": true
+    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
@@ -4398,6 +11343,12 @@
       "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
       "dev": true
     },
+    "yallist": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
+      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+      "dev": true
+    },
     "yargs": {
       "version": "6.6.0",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-6.6.0.tgz",
@@ -4474,6 +11425,55 @@
           "dev": true
         }
       }
+    },
+    "yauzl": {
+      "version": "2.9.1",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.9.1.tgz",
+      "integrity": "sha1-qBmB6nCleUYTOIPwKcWCGok1mn8=",
+      "dev": true,
+      "requires": {
+        "buffer-crc32": "0.2.13",
+        "fd-slicer": "1.0.1"
+      }
+    },
+    "zip": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/zip/-/zip-1.2.0.tgz",
+      "integrity": "sha1-rQrUImUwm+QutW/IYZThfCTmapw=",
+      "dev": true,
+      "requires": {
+        "bops": "0.1.1"
+      }
+    },
+    "zip-dir": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/zip-dir/-/zip-dir-1.0.2.tgz",
+      "integrity": "sha1-JT+QeurWKiGs2HIdi4gDKyQRwFE=",
+      "dev": true,
+      "requires": {
+        "async": "1.5.2",
+        "jszip": "2.6.1"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
+          "dev": true
+        }
+      }
+    },
+    "zip-stream": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/zip-stream/-/zip-stream-1.2.0.tgz",
+      "integrity": "sha1-qLxF9MG0lpnGuQGYuqyqzbzUugQ=",
+      "dev": true,
+      "requires": {
+        "archiver-utils": "1.3.0",
+        "compress-commons": "1.2.2",
+        "lodash": "4.17.4",
+        "readable-stream": "2.3.3"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index d41067a..f77aa61 100644
--- a/package.json
+++ b/package.json
@@ -1,29 +1,30 @@
 {
   "name": "shield-studies-addon-utils",
-  "description": "Utilities for building Shield-Study Mozilla Firefox addons.",
-  "version": "4.1.0",
-  "author": "Gregg Lind <glind@mozilla.com>",
+  "description": "Utilities for building Shield-Study Mozilla Firefox add-ons.",
+  "version": "5.0.0-alpha1",
+  "author": "Mozilla",
   "bugs": {
     "url": "https://github.com/mozilla/shield-studies-addon-utils/issues"
   },
   "dependencies": {
-    "assert": "^1.4.1",
-    "fs-extra": "^4.0.0",
-    "fx-runner": "^1.0.7",
-    "geckodriver": "^1.8.0",
-    "mocha": "^3.4.2",
-    "path": "^0.12.7",
-    "selenium-webdriver": "^3.4.0"
+    "shield-study-schemas": "^0.8.3"
   },
   "devDependencies": {
     "ajv": "^4.11.2",
+    "assert": "^1.4.1",
     "doctoc": "^1.3.1",
     "eslint": "^4.0.0",
     "eslint-plugin-json": "^1.2.0",
     "eslint-plugin-mozilla": "^0.4.0",
     "fixpack": "^2.3.1",
+    "fs-extra": "^4.0.0",
+    "fx-runner": "^1.0.7",
+    "geckodriver": "^1.8.0",
+    "mocha": "^3.4.2",
+    "npm-run-all": "^4.1.2",
     "prettier": "^1.11.0",
-    "shield-study-schemas": "^0.8.3",
+    "selenium-webdriver": "^3.4.0",
+    "web-ext": "^2.5.0",
     "webpack": "^2.6.1"
   },
   "files": [
@@ -39,19 +40,28 @@
     "shield-study"
   ],
   "license": "MPL-2.0",
-  "main": "lib/index.js",
+  "main": "src/index.js",
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/mozilla/shield-studies-addon-utils.git"
+    "url": "git://github.com/mozilla/shield-studies-addon-utils.git"
   },
   "scripts": {
-    "build-test-addon-xpi": "./bin/make_xpi.sh",
-    "dist": "webpack",
+    "build": "cd webExtensionApis/study && webpack",
+    "docformat": "doctoc --title '**Contents**' docs/*.md && prettier '**/*.md' --write",
     "eslint": "eslint src --ext jsm --ext js --ext json",
-    "predist": "npm run eslint",
-    "prepack": "fixpack && npm run dist",
-    "pretest": "npm run dist && npm run build-test-addon-xpi",
-    "test": "export FIREFOX_BINARY=firefox && XPI_NAME=test-addon/test-addon.xpi mocha test",
-    "docformat": "doctoc --title '**Contents**' docs/*.md && prettier '**/*.md' --write"
+    "eslint-fix": "npm run eslint -- --fix",
+    "format": "prettier '**/*.{css,js,jsm,json,md}' --trailing-comma=all --ignore-path=.eslintignore --write",
+    "lint": "npm-run-all lint:*",
+    "lint:eslint": "npm run eslint",
+    "lint:fixpack": "fixpack",
+    "postformat": "npm run eslint-fix && fixpack",
+    "prebuild": "npm run lint",
+    "prepack": "fixpack && npm run build",
+    "pretest": "npm run build && npm run test-addon:bundle-utils && npm run test-addon:build",
+    "pretest-addon:run": "npm run pretest",
+    "test": "FIREFOX_BINARY=${FIREFOX_BINARY:-firefox} ADDON_ZIP=examples/test-addon/dist/shield_utils_test_add-on-1.0.0.zip mocha examples/test-addon/test/functional/ --bail",
+    "test-addon:build": "cd examples/test-addon && web-ext build",
+    "test-addon:bundle-utils": "examples/test-addon/bin/bundle-shield-studies-addon-utils.sh",
+    "test-addon:run": "cd examples/test-addon && web-ext run --no-reload"
   }
 }
diff --git a/shield-study-helper-addon/addon/webextension/.eslintrc.json b/shield-study-helper-addon/addon/webextension/.eslintrc.json
deleted file mode 100644
index 1d71c50..0000000
--- a/shield-study-helper-addon/addon/webextension/.eslintrc.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-    "env": {
-        "browser": true,
-        "es6": true,
-        "webextensions": true
-    },
-    "extends": [
-      "eslint:recommended"
-    ],
-    "rules": {
-      "no-console": "warn"
-    }
-}
diff --git a/src/StudyUtils.in.jsm b/src/StudyUtils.in.jsm
deleted file mode 100644
index f4a5e88..0000000
--- a/src/StudyUtils.in.jsm
+++ /dev/null
@@ -1,831 +0,0 @@
-"use strict";
-
-/*
-* For an overview of what this module does, see ABOUT.md at
-* github.com/mozilla/shield-studies-addon-template
-*
-* Note: There are a number of methods that won't work if the 
-* setup method has not executed (they perform a check with the 
-* `throwIfNotSetup` method). The setup method ensures that the
-* config data passed in is valid per the studySetup schema.
-*/
-
-
-/*
-* TODO glind survey / urls & query args
-* TODO glind publish as v4
-*/
-const EXPORTED_SYMBOLS = ["studyUtils"];
-
-const UTILS_VERSION = require("../package.json").version;
-const PACKET_VERSION = 3;
-
-const {utils: Cu} = Components;
-Cu.import("resource://gre/modules/AddonManager.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-Cu.importGlobalProperties(["URL", "crypto", "URLSearchParams"]);
-
-let log;
-
-// telemetry utils
-const CID = Cu.import("resource://gre/modules/ClientID.jsm", null);
-const { TelemetryController }
-  = Cu.import("resource://gre/modules/TelemetryController.jsm", null);
-const { TelemetryEnvironment }
-  = Cu.import("resource://gre/modules/TelemetryEnvironment.jsm", null);
-
-/*
-* Set-up JSON schema validation
-* Schemas are used to validate an input (here, via AJV at runtime)
-* Schemas here are used for:
-*  - Telemetry (Ensure correct Parquet format for different types of
-*    outbound packets):
-*    - "shield-study": shield study state and outcome data common to all
-*      shield studies.
-*    - "shield-study-addon": addon-specific probe data, with `attributes`
-*      (used to capture feature-specific state) sent as Map(string,string).
-*    - "shield-study-error": data used to notify, group and count some kinds
-*      of errors from shield studies
-*  - ShieldUtils API ducktypes:
-*    - "weightedVariations": the array of branch name:weight pairs used to
-*      randomly assign the user
-*    to a branch
-*    - "webExtensionMsg": the message object passed into the
-*      StudyUtils.respondToWebExtensionMessage method
-*    - "studySetup": the options object passed into the StudyUtils.setup method
-*/
-const schemas = require("./schemas.js");
-const Ajv = require("ajv/dist/ajv.min.js");
-const ajv = new Ajv();
-
-var jsonschema = {
-  /**
-  * Validates input data based on a specified schema
-  * @param {Object} data - The data to be validated
-  * @param {Object} schema - The schema to validate against
-  * @returns {boolean} - Will return true if the data is valid
-  */
-  validate(data, schema) {
-    var valid = ajv.validate(schema, data);
-    return {valid, errors:  ajv.errors || []};
-  },
-  /**
-  * Validates input data based on a specified schema
-  * @param {Object} data - The data to be validated
-  * @param {Object} schema - The schema to validate against
-  * @throws Will throw an error if the data is not valid
-  * @returns {boolean} - Will return true if the data is valid
-  */
-  validateOrThrow(data, schema) {
-    const valid = ajv.validate(schema, data);
-    if (!valid) { throw new Error(JSON.stringify((ajv.errors))); }
-    return true;
-  },
-};
-
-/**
- * Note: This is the deep merge from the addon-sdk (sdk/util/object.js).
- * Probably deeper than we need. Unlike the shallow merge with the
- * spread operator (const c = {...a, ...b}), this function can be configured
- * to copy non-enumerable properties, symbols, and property descriptors.
- * 
- * Merges all the properties of all arguments into first argument. If two or
- * more argument objects have own properties with the same name, the property
- * is overridden, with precedence from right to left, implying, that properties
- * of the object on the left are overridden by a same named property of the
- * object on the right.
- *
- * Any argument given with "falsy" value - commonly `null` and `undefined` in
- * case of objects - are skipped.
- *
- * @examples
- *    var a = { bar: 0, a: 'a' }
- *    var b = merge(a, { foo: 'foo', bar: 1 }, { foo: 'bar', name: 'b' });
- *    b === a   // true
- *    b.a       // 'a'
- *    b.foo     // 'bar'
- *    b.bar     // 1
- *    b.name    // 'b'
- *
- * @param {...Object} source - two or more object arguments
- * @returns {Object} - the resulting merged object
- */
-function merge(source) {
-  const optionsDefault = {
-    names: true,
-    symbols: true,
-    nonEnumerables: true,
-  };
-  /**
-  * Gets object's own property symbols and/or names, including non-enumerables
-  * by default
-  * @param {Object} object - the object for which to get own property symbols
-  * and names
-  * @param {Object} options - object indicating what kinds of properties to
-  * merge
-  * @param {boolean} options.name - True if function should return object's own
-  * property names
-  * @param {boolean} options.symbols - True if function should return object's
-  * own property symbols
-  * @param {boolean} options.nonEnumerables - True if function should return
-  * object's non-enumerable own property names
-  * @returns {string[]|symbol[]} - An array of own property names and/or symbols
-  * for object
-  */
-  function getOwnPropertyIdentifiers(object, options = optionsDefault) {
-    const symbols = !options.symbols ? [] :
-      Object.getOwnPropertySymbols(object);
-
-    // eslint-disable-next-line
-    const names = !options.names ? [] :
-      options.nonEnumerables ? Object.getOwnPropertyNames(object) :
-        Object.keys(object);
-    return [...names, ...symbols];
-  }
-  /*
-  * descriptor: an object whose own enumerable properties constitute descriptors
-  * for the properties from arguments[1]+ to be defined or modified in
-  * arguments[0]
-  */
-  const descriptor = {};
-  /*
-  * `Boolean` converts the first parameter to a boolean value. Any object is
-  * converted to `true` where `null` and `undefined` becames `false`. Therefore
-  * the `filter` method will keep only objects that are defined and not null.
-  */
-  Array.slice(arguments, 1).filter(Boolean).forEach((properties) => {
-    getOwnPropertyIdentifiers(properties).forEach((name) => {
-      descriptor[name] = Object.getOwnPropertyDescriptor(properties, name);
-    });
-  });
-  return Object.defineProperties(source, descriptor);
-}
-
-/**
-* Appends a query string to a url.
-* @param {string} url - a base url to append; must be static (data) or external
-* @param {Object} args - query arguments, one or more object literal used to
-* build a query string
-* @returns {string} - an absolute url appended with a query string
-*/
-function mergeQueryArgs(url, ...args) {
-  // currently left to right
-  // TODO, glind, decide order of merge here
-  // TODO, use Object.assign, or ES7 spread
-  const U = new URL(url);
-  // get the query string already attached to url, if it exists
-  let q = U.search || "?";
-  // create an interface to interact with the query string
-  q = new URLSearchParams(q);
-  const merged = merge({}, ...args);
-  // Set each search parameter in "merged" to its value in the query string,
-  // building up the query string one search parameter at a time.
-  Object.keys(merged).forEach((k) => {
-    // k, the search parameter (ex: fxVersion)
-    // q.get(k), returns the value of k, in query string, q (ex: 57.0.1a)
-    log.debug(q.get(k), k, merged[k]);
-    q.set(k, merged[k]);
-  });
-  // append our new query string to the URL object made with "url"
-  U.search = q.toString();
-  // return the full url, with the appended query string
-  return U.toString();
-}
-
-// sampling utils
-/**
-* @async
-* Converts a string into its sha256 hexadecimal representation.
-* Note: This is ultimately used to make a hash of the user's telemetry clientID
-* and the study name.
-* @param {string} message - The message to convert.
-* @returns {string} - a hexadecimal, 256-bit hash
-*/
-async function sha256(message) {
-  // encode as UTF-8
-  const msgBuffer = new TextEncoder("utf-8").encode(message);
-  // hash the message
-  const hashBuffer = await crypto.subtle.digest("SHA-256", msgBuffer);
-  // convert ArrayBuffer to Array
-  const hashArray = Array.from(new Uint8Array(hashBuffer));
-  // convert bytes to hex string
-  const hashHex
-    = hashArray.map(b => ("00" + b.toString(16)).slice(-2)).join("");
-  return hashHex;
-}
-
-/**
-* Converts an array of length N into a cumulative sum array of length N,
-* where n_i = sum(array.slice(0,i)) i.e. each element is the sum of all
-* elements up to and including that element
-* This is ultimately used for turning sample weights (AKA weightedVariations)
-* into right hand limits (>= X) to  deterministically select which variation
-* a user receives.
-* @example [.25,.3,.45] => [.25,.55,1.0]; if a user's sample weight were .25,
-* they would fall into the left-most bucket
-* @param {Number[]} arr - An array of sample weights (0 <= sample weight < 1)
-* @returns {Number[]} - A cumulative sum array of sample weights
-* (0 <= sample weight <= 1)
-*/
-function cumsum(arr) {
-  return arr.reduce(function(r, c, i) {
-    r.push((r[i - 1] || 0) + c);
-    return r;
-  }, [] );
-}
-
-/**
-* Given sample weights (weightedVariations) and a particular position
-* (fraction), return a variation.  If no fraction given, return a variation
-* at random fraction proportional to the weightVariations object
-* @param {Object[]} weightedVariations - the array of branch name:weight pairs
-* used to randomly assign the user to a branch
-* @param {Number} fraction - a number (0 <= fraction < 1)
-* @returns {Object} - the variation object in weightedVariations for the given
-* fraction
-*/
-function chooseWeighted(weightedVariations, fraction = Math.random()) {
-  /*
-   weightedVaiations, list of:
-   {
-    name: string of any length
-    weight: float >= 0
-   }
-  */
-  jsonschema.validateOrThrow(weightedVariations, schemas.weightedVariations);
-
-  var weights = weightedVariations.map(x => x.weight || 1);
-  const partial = cumsum(weights);
-  const total = weights.reduce((a, b) => a + b);
-  for (let ii = 0; ii < weightedVariations.length; ii++) {
-    if (fraction <= partial[ii] / total) {
-      return weightedVariations[ii];
-    }
-  }
-  return null;
-}
-
-/**
-* @async
-* Converts a string into a fraction (0 <= fraction < 1) based on the first
-* X bits of its sha256 hexadecimal representation
-* Note: Salting (adding the study name to the telemetry clientID) ensures
-* that the same user gets a different bucket/hash for each study.
-* Hashing of the salted string ensures uniform hashing; i.e. that every
-* bucket/variation gets filled.
-* @param {string} saltedString - a salted string used to create a hash for
-* the user
-* @param {Number} bits - The first number of bits to use in the sha256 hex
-* representation
-* @returns {Number} - a fraction (0 <= fraction < 1)
-*/
-async function hashFraction(saltedString, bits = 12) {
-  const hash = await sha256(saltedString);
-  return parseInt(hash.substr(0, bits), 16) / Math.pow(16, bits);
-}
-
-/**
-* Class representing utilities for shield studies.
-*/
-class StudyUtils {
-  /**
-  * Create a StudyUtils instance.
-  */
-  constructor() {
-    /*
-    * TODO glind Answer: no.  see if you can merge the construtor and setup
-    * and export the class, rather than a singleton
-    */
-    /**
-    * Handles a message received by the webExtension, sending a response back.
-    * @param {Object} webExtensionMsg object, see its schema
-    * @param {boolean} webExtensionMsg.shield - Whether or not the message
-    * is a shield message (intended for StudyUtils)
-    * @param {string} webExtensionMsg.msg - StudyUtils method to be called
-    *from the webExtension
-    * @param {*} webExtensionMsg.data - Data sent from webExtension
-    * @param {Object} sender - Details about the message sender, see
-    * runtime.onMessage MDN docs
-    * @param {responseCallback} sendResponse - The callback to send a response
-    * back to the webExtension
-    * @returns {boolean|undefined} - true if the message has been processed
-    * (shield message) or ignored (non-shield message)
-    */
-    this.respondToWebExtensionMessage
-      = function({shield, msg, data}, sender, sendResponse) {
-        // @TODO glind: make sure we're using the webExtensionMsg schema
-        if (!shield) return true;
-        const allowedMethods = ["endStudy", "telemetry", "info"];
-        if (!allowedMethods.includes(msg)) {
-          const errStr1 = "respondToWebExtensionMessage:";
-          const errStr2 = "is not in allowed studyUtils methods:";
-          throw new Error(`${errStr1} "${msg}" ${errStr2} ${allowedMethods}`);
-        }
-        /*
-        * handle async
-        * Execute the StudyUtils method requested by the webExtension
-        * then send the webExtension a response with their return value
-        */
-        Promise.resolve(this[msg](data)).then(
-          function(ans) {
-            log.debug("respondingTo", msg, ans);
-            sendResponse(ans);
-          },
-          // function error eventually
-        );
-        return true;
-        /* Ensure this method is bound to the instance of studyUtils, see
-        * callsite in bootstrap.js
-        * TODO glind: bdanforth's claim: making this function a StudyUtils
-        * method would also do this.
-        */
-      }.bind(this);
-
-    /*
-    * Expose sampling methods onto the exported studyUtils singleton, for use
-    * by any Components.utils-importing module
-    */
-    this.sample = {
-
-      sha256,
-      cumsum,
-      chooseWeighted,
-      hashFraction,
-    };
-    // expose schemas
-    this.schemas = schemas;
-
-    // expose validation methods
-    this.jsonschema = jsonschema;
-
-    this.REASONS = REASONS;
-  }
-
-  /**
-  * Checks if the StudyUtils.setup method has been called
-  * @param {string} name - the name of a StudyUtils method
-  * @returns {void}
-  */
-  throwIfNotSetup(name = "unknown") {
-    if (!this._isSetup) throw new Error(
-      name + ": this method can't be used until `setup` is called"
-    );
-  }
-
-  /**
-  * Validates the studySetup object passed in from the addon.
-  * @param {Object} config - the studySetup object, see schema.studySetup.json
-  * @returns {StudyUtils} - the StudyUtils class instance
-  */
-  setup(config) {
-    log = createLog("shield-study-utils", config.log.studyUtils.level);
-
-    log.debug("setting up!");
-    jsonschema.validateOrThrow(config, schemas.studySetup);
-
-    this.config = config;
-    this._isSetup = true;
-    return this;
-  }
-
-  /**
-  * Resets the state of the study. Suggested use is for testing.
-  * @returns {void}
-  */
-  reset() {
-    this.config = {};
-    delete this._variation;
-    this._isSetup = false;
-  }
-
-  /**
-  * @async
-  * Opens a new tab that loads a page with the specified URL.
-  * @param {string} url - the url of a page
-  * @param {Object} params - optional, see
-  * https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XUL/Method/addTab
-  * @returns {void}
-  */
-  async openTab(url, params = {}) {
-    this.throwIfNotSetup("openTab");
-    log.debug(url, params);
-    log.debug("opening this formatted tab", url, params);
-    if (!Services.wm.getMostRecentWindow("navigator:browser").gBrowser) {
-      /*
-      * Automated tests run faster than Firefox opens windows.
-      * TODO: Find less gross way to do this
-      * Wait for the window to be opened
-      */
-      await new Promise(resolve => setTimeout(resolve, 30000));
-    }
-    Services.wm.getMostRecentWindow("navigator:browser")
-      .gBrowser.addTab(url, params);
-  }
-
-  /**
-  * @async
-  * Gets the telemetry client ID for the user.
-  * @returns {string} - the telemetry client ID
-  */
-  async getTelemetryId() {
-    const id = TelemetryController.clientID;
-    /* istanbul ignore next */
-    if (id === undefined) {
-      return await CID.ClientIDImpl._doLoadClientID();
-    }
-    return id;
-  }
-
-  /**
-  * Sets the variation for the StudyUtils instance.
-  * @param {Object} variation - the study variation for this user
-  * @returns {StudyUtils} - the StudyUtils class instance
-  */
-  setVariation(variation) {
-    this.throwIfNotSetup("setVariation");
-    this._variation = variation;
-    return this;
-  }
-
-  /**
-  * Gets the variation for the StudyUtils instance.
-  * @returns {Object} - the study variation for this user
-  */
-  getVariation() {
-    this.throwIfNotSetup("getvariation");
-    return this._variation;
-  }
-
-  /**
-  * @async
-  * Deterministically selects and returns the study variation for the user.
-  * @param {Object[]} weightedVariations - see schema.weightedVariations.json
-  * @param {Number} rng - randomly generated number (0 <= rng < 1) of the form
-  * returned by Math.random; can be set explicitly for testing
-  * @returns {Object} - the study variation for this user
-  */
-  async deterministicVariation(weightedVariations, rng = null) {
-    // hash the studyName and telemetryId to get the same branch every time.
-    this.throwIfNotSetup("deterministicVariation needs studyName");
-    // this is the standard arm choosing method
-    let fraction = rng;
-    if (fraction === null) {
-      const clientId = await this.getTelemetryId();
-      const studyName = this.config.study.studyName;
-      fraction = await this.sample.hashFraction(studyName + clientId, 12);
-    }
-    return this.sample.chooseWeighted(weightedVariations, fraction);
-  }
-
-  /**
-  * Gets the Shield recipe client ID.
-  * @returns {string} - the Shield recipe client ID.
-  */
-  getShieldId() {
-    const key = "extensions.shield-recipe-client.user_id";
-    return Services.prefs.getCharPref(key, "");
-  }
-
-  /**
-  * Packages information about the study into an object.
-  * @returns {Object} - study information, see schema.studySetup.json
-  */
-  info() {
-    log.debug("getting info");
-    this.throwIfNotSetup("info");
-    return {
-      studyName: this.config.study.studyName,
-      addon: this.config.addon,
-      variation: this.getVariation(),
-      shieldId: this.getShieldId(),
-    };
-  }
-
-  /**
-  * Get the telemetry configuration for the study.
-  * @returns {Object} - the telemetry cofiguration, see schema.studySetup.json
-  */
-  // TODO glind, maybe this is getter / setter?
-  get telemetryConfig() {
-    this.throwIfNotSetup("telemetryConfig");
-    return this.config.study.telemetry;
-  }
-
-  /**
-  * Sends an 'enter' telemetry ping for the study; should be called on addon
-  * startup for the reason ADDON_INSTALL. For more on study states like 'enter'
-  * see ABOUT.md at github.com/mozilla/shield-studies-addon-template
-  * @returns {void}
-  */
-  firstSeen() {
-    log.debug(`firstSeen`);
-    this.throwIfNotSetup("firstSeen uses telemetry.");
-    this._telemetry({study_state: "enter"}, "shield-study");
-  }
-
-  /**
-  * Marks the study's telemetry pings as being part of this experimental
-  * cohort in a way that downstream data pipeline tools (like ExperimentsViewer)
-  * can use it.
-  * @returns {void}
-  */
-  setActive() {
-    this.throwIfNotSetup("setActive uses telemetry.");
-    const info = this.info();
-    log.debug(
-      "marking TelemetryEnvironment",
-      info.studyName,
-      info.variation.name
-    );
-    TelemetryEnvironment.setExperimentActive(
-      info.studyName,
-      info.variation.name
-    );
-  }
-
-  /**
-  * Removes the study from the active list of telemetry experiments
-  * @returns {void}
-  */
-  unsetActive() {
-    this.throwIfNotSetup("unsetActive uses telemetry.");
-    const info = this.info();
-    log.debug(
-      "unmarking TelemetryEnvironment",
-      info.studyName,
-      info.variation.name
-    );
-    TelemetryEnvironment.setExperimentInactive(info.studyName);
-  }
-
-  /**
-  * Uninstalls the shield study addon, given its addon id.
-  * @param {string} id - the addon id
-  * @returns {void}
-  */
-  uninstall(id) {
-    if (!id) id = this.info().addon.id;
-    if (!id) {
-      this.throwIfNotSetup("uninstall needs addon.id as arg or from setup.");
-    }
-    log.debug(`about to uninstall ${id}`);
-    AddonManager.getAddonByID(id, addon => addon.uninstall());
-  }
-
-  /**
-  * @async
-  * Adds the study to the active list of telemetry experiments and sends the
-  * "installed" telemetry ping if applicable
-  * @param {string} reason - The reason the addon has started up
-  * @returns {void}
-  */
-  async startup({reason}) {
-    this.throwIfNotSetup("startup");
-    log.debug(`startup ${reason}`);
-    this.setActive();
-    if (reason === REASONS.ADDON_INSTALL) {
-      this._telemetry({study_state: "installed"}, "shield-study");
-    }
-  }
-
-  /**
-  * @async
-  * Ends the study:
-  *  - Removes the study from the active list of telemetry experiments
-  *  - Opens a new tab at a specified URL, if present (e.g. for a survey)
-  *  - Sends a telemetry ping about the nature of the ending
-  *    (positive, neutral, negative)
-  *  - Sends an exit telemetry ping
-  * @param {Object} param - A details object describing why the study is ending
-  * @param {string} param.reason - The reason the study is ending, see
-  * schema.studySetup.json
-  * @param {string} param.fullname -  optional, the full name of the study
-  * state, see schema.studySetup.json
-  * @returns {void}
-  */
-  async endStudy({reason, fullname}) {
-    this.throwIfNotSetup("endStudy");
-    if (this._isEnding) {
-      log.debug("endStudy, already ending!");
-      return;
-    }
-    this._isEnding = true;
-    log.debug(`endStudy ${reason}`);
-    this.unsetActive();
-    // TODO glind, think about reason vs fullname
-    // TODO glind, think about race conditions for endings, ensure only one exit
-    /*
-    * Check if the study ending shows the user a page in a new tab
-    * (ex: survey, explanation, etc.)
-    */
-    const ending = this.config.study.endings[reason];
-    if (ending) {
-      // baseUrl: needs to be appended with query arguments before use,
-      // exactUrl: used as is
-      const {baseUrl, exactUrl} = ending;
-      if (exactUrl) {
-        this.openTab(exactUrl);
-      } else if (baseUrl) {
-        const qa = await this.endingQueryArgs();
-        qa.reason = reason;
-        qa.fullreason = fullname;
-        const fullUrl = mergeQueryArgs(baseUrl, qa);
-        log.debug(baseUrl, fullUrl);
-        this.openTab(fullUrl);
-      }
-    }
-    switch (reason) {
-      case "ineligible":
-      case "expired":
-      case "user-disable":
-      case "ended-positive":
-      case "ended-neutral":
-      case "ended-negative":
-        this._telemetry({study_state: reason, fullname}, "shield-study");
-        break;
-      default:
-        this._telemetry(
-          {
-            study_state: "ended-neutral",
-            study_state_fullname: reason,
-          },
-          "shield-study"
-        );
-        // unless we know better TODO grl
-    }
-    // these are all exits
-    this._telemetry({study_state: "exit"}, "shield-study");
-    this.uninstall(); // TODO glind. should be controllable by arg?
-  }
-
-  /**
-  * @async
-  * Builds an object whose properties are query arguments that can be
-  * appended to a study ending url
-  * @returns {Object} - the query arguments for the study
-  */
-  async endingQueryArgs() {
-    // TODO glind, make this back breaking!
-    this.throwIfNotSetup("endingQueryArgs");
-    const info = this.info();
-    const who = await this.getTelemetryId();
-    const queryArgs = {
-      shield: PACKET_VERSION,
-      study: info.studyName,
-      variation: info.variation.name,
-      updateChannel: Services.appinfo.defaultUpdateChannel,
-      fxVersion: Services.appinfo.version,
-      addon: info.addon.version, // addon version
-      who, // telemetry clientId
-    };
-    queryArgs.testing = Number(!this.telemetryConfig.removeTestingFlag);
-    return queryArgs;
-  }
-
-  /**
-  * @async
-  * Validates and submits telemetry pings from StudyUtils.
-  * @param {Object} data - the data to send as part of the telemetry packet
-  * @param {string} bucket - the type of telemetry packet to be sent
-  * @returns {Promise|boolean} - A promise that resolves with the ping id
-  * once the ping is stored or sent, or false if
-  *   - there is a validation error,
-  *   - the packet is of type "shield-study-error"
-  *   - the study's telemetryConfig.send is set to false
-  */
-  async _telemetry(data, bucket = "shield-study-addon") {
-    log.debug(`telemetry in:  ${bucket} ${JSON.stringify(data)}`);
-    this.throwIfNotSetup("_telemetry");
-    const info = this.info();
-    const payload = {
-      version:        PACKET_VERSION,
-      study_name:     info.studyName,
-      branch:         info.variation.name,
-      addon_version:  info.addon.version,
-      shield_version: UTILS_VERSION,
-      type:           bucket,
-      data,
-      testing:        !this.telemetryConfig.removeTestingFlag,
-    };
-
-    let validation;
-    /* istanbul ignore next */
-    try {
-      validation = jsonschema.validate(payload, schemas[bucket]);
-    } catch (err) {
-      // Catch failures of unknown origin (could be library, addon, system...)
-      // if validation broke, GIVE UP.
-      log.error(err);
-      return false;
-    }
-    /*
-    * Handle validation errors by sending a "shield-study-error"
-    * telemetry ping with the error report.
-    * If the invalid payload is itself of type "shield-study-error",
-    * throw an error (to avoid a possible infinite loop).
-    */
-    if (validation.errors.length) {
-      const errorReport = {
-        "error_id": "jsonschema-validation",
-        "error_source": "addon",
-        "severity": "fatal",
-        "message": JSON.stringify(validation.errors),
-      };
-      if (bucket === "shield-study-error") {
-        // log: if it's a warn or error, it breaks jpm test
-        log.warn("cannot validate shield-study-error", data, bucket);
-        return false; // just die, maybe should have a super escape hatch?
-      }
-      return this.telemetryError(errorReport);
-    }
-    // emit(TelemetryWatcher, 'telemetry', [bucket, payload]);
-    log.debug(`telemetry: ${JSON.stringify(payload)}`);
-    // FIXME marcrowo: addClientId makes the ping not appear in test?
-    // seems like a problem with Telemetry, not the shield-study-utils library
-    const telOptions = {addClientId: true, addEnvironment: true};
-    if (!this.telemetryConfig.send) {
-      log.debug("NOT sending.  `telemetryConfig.send` is false");
-      return false;
-    }
-    return TelemetryController.submitExternalPing(bucket, payload, telOptions);
-  }
-
-  /**
-  * @async
-  * Validates and submits telemetry pings from the addon; mostly from
-  * webExtension messages.
-  * @param {Object} data - the data to send as part of the telemetry packet
-  * @returns {Promise|boolean} - see StudyUtils._telemetry
-  */
-  async telemetry(data) {
-    log.debug(`telemetry ${JSON.stringify(data)}`);
-    const toSubmit = {
-      attributes: data,
-    };
-    // lets check early, and respond with something useful?
-    return this._telemetry(toSubmit, "shield-study-addon");
-  }
-
-  /**
-  * Submits error report telemetry pings.
-  * @param {Object} errorReport - the error report, see StudyUtils._telemetry
-  * @returns {Promise|boolean} - see StudyUtils._telemetry
-  */
-  telemetryError(errorReport) {
-    return this._telemetry(errorReport, "shield-study-error");
-  }
-
-  /**
-  * Sets the logging level. This is can be called from the addon, even after the
-  * log has been created.
-  * @param {string} descriptor - the Log level (e.g. "trace", "error", ...)
-  * @returns {void}
-  */
-  setLoggingLevel(descriptor) {
-    log.level = Log.Level[descriptor];
-  }
-
-}
-
-/**
-* Creates a log for debugging.
-* Note: Log.jsm is used over Console.log/warn/error because:
-*   - Console has limited log levels
-*   - Console is not pref-controllable. Log can be turned on and off using
-*     config.log (see ./addon/Config.jsm in
-*     github.com/mozilla/shield-study-addon-template)
-*   - Console can create linting errors and warnings.
-* @param {string} name - the name of the Logger instance
-* @param {string} levelWord - the Log level (e.g. "trace", "error", ...)
-* @returns {Object} - the Logger instance, see gre/modules/Log.jsm
-*/
-function createLog(name, levelWord) {
-  Cu.import("resource://gre/modules/Log.jsm");
-  var L = Log.repository.getLogger(name);
-  L.addAppender(new Log.ConsoleAppender(new Log.BasicFormatter()));
-  // should be a config / pref
-  L.level = Log.Level[levelWord] || Log.Level.Debug;
-  L.debug("log made", name, levelWord, Log.Level[levelWord]);
-  return L;
-}
-
-// addon state change reasons
-const REASONS = {
-  APP_STARTUP: 1,      // The application is starting up.
-  APP_SHUTDOWN: 2,     // The application is shutting down.
-  ADDON_ENABLE: 3,     // The add-on is being enabled.
-  ADDON_DISABLE: 4,    // The add-on is being disabled. (Also sent at uninstall)
-  ADDON_INSTALL: 5,    // The add-on is being installed.
-  ADDON_UNINSTALL: 6,  // The add-on is being uninstalled.
-  ADDON_UPGRADE: 7,    // The add-on is being upgraded.
-  ADDON_DOWNGRADE: 8,  // The add-on is being downgraded.
-};
-for (const r in REASONS) { REASONS[REASONS[r]] = r; }
-
-// Actually create the singleton.
-var studyUtils = new StudyUtils();
-
-// to make this work with webpack!
-this.EXPORTED_SYMBOLS = EXPORTED_SYMBOLS;
-this.studyUtils = studyUtils;
diff --git a/src/schema.webExtensionMsg.json b/src/schema.webExtensionMsg.json
deleted file mode 100644
index 5c5814f..0000000
--- a/src/schema.webExtensionMsg.json
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  "$schema": "http://json-schema.org/draft-04/schema#",
-  "title": "webExtension browserMessage",
-  "type": "object",
-  "properties": {
-    "shield": {
-      "type": "boolean"
-    },
-    "msg": {
-      "type": "string",
-      "enum": [
-        "endStudy",
-        "telemetry",
-        "info"
-      ]
-    },
-    "data": {
-      "type": "object"
-    }
-  },
-  "required": [
-    "shield",
-    "msg"
-  ]
-}
diff --git a/src/schemas.js b/src/schemas.js
deleted file mode 100644
index 27ecb3d..0000000
--- a/src/schemas.js
+++ /dev/null
@@ -1,8 +0,0 @@
-module.exports = {
-  "shield-study": require("shield-study-schemas/schemas-client/shield-study.schema.json"),
-  "shield-study-addon":  require("shield-study-schemas/schemas-client/shield-study-addon.schema.json"),
-  "shield-study-error":  require("shield-study-schemas/schemas-client/shield-study-error.schema.json"),
-  "studySetup":  require("./schema.studySetup.json"),
-  "webExtensionMsg": require("./schema.webExtensionMsg.json"),
-  "weightedVariations": require("./schema.weightedVariations.json"),
-};
diff --git a/test-addon/.gitignore b/test-addon/.gitignore
deleted file mode 100644
index 5561a3d..0000000
--- a/test-addon/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-StudyUtils.jsm
diff --git a/test-addon/README.md b/test-addon/README.md
deleted file mode 100644
index 40af997..0000000
--- a/test-addon/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-This is an example add-on that is used to test the shield-study-utils library.
-
-We include the library by obtaining a copy of dist/StudyUtils.jsm (created by `npm run dist` = `webpack`).
diff --git a/test-addon/bootstrap.js b/test-addon/bootstrap.js
deleted file mode 100644
index 4bccfe5..0000000
--- a/test-addon/bootstrap.js
+++ /dev/null
@@ -1,11 +0,0 @@
-const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "studyUtils", "resource://test-addon/StudyUtils.jsm");
-
-this.install = function(data, reason) {};
-
-this.startup = async function(data, reason) {};
-
-this.shutdown = function(data, reason) {};
-
-this.uninstall = function(data, reason) {};
diff --git a/test-addon/build-includes.txt b/test-addon/build-includes.txt
deleted file mode 100644
index 667c77d..0000000
--- a/test-addon/build-includes.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-bootstrap.js
-chrome.manifest
-install.rdf
-StudyUtils.jsm
-utils.jsm
diff --git a/test-addon/chrome.manifest b/test-addon/chrome.manifest
deleted file mode 100644
index 9721aaa..0000000
--- a/test-addon/chrome.manifest
+++ /dev/null
@@ -1 +0,0 @@
-resource test-addon .
diff --git a/test-addon/install.rdf b/test-addon/install.rdf
deleted file mode 100644
index 41781f8..0000000
--- a/test-addon/install.rdf
+++ /dev/null
@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="http://www.mozilla.org/2004/em-rdf#">
-  <Description about="urn:mozilla:install-manifest">
-    <em:id>shield-study-utils-test@mozilla.org</em:id>
-    <em:type>2</em:type>
-    <em:bootstrap>true</em:bootstrap>
-    <em:unpack>false</em:unpack>
-    <em:version>0.1.0</em:version>
-    <em:name>Test Add-on for shield-study-utils</em:name>
-    <em:description>Add-on whose sole purpose of existence is to test the shield-study-utils library.</em:description>
-    <em:multiprocessCompatible>true</em:multiprocessCompatible>
-
-    <em:targetApplication>
-      <Description>
-        <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id> <!--Firefox-->
-        <em:minVersion>54</em:minVersion>
-        <em:maxVersion>*</em:maxVersion>
-      </Description>
-    </em:targetApplication>
-  </Description>
-</RDF>
diff --git a/test-addon/utils.jsm b/test-addon/utils.jsm
deleted file mode 100644
index 1472083..0000000
--- a/test-addon/utils.jsm
+++ /dev/null
@@ -1,41 +0,0 @@
-/* eslint no-unused-vars: "off" */
-
-const { studyUtils } = Components.utils.import("resource://test-addon/StudyUtils.jsm", {});
-Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
-Components.utils.import("resource://gre/modules/Console.jsm");
-
-var EXPORTED_SYMBOLS = ["fakeSetup", "getMostRecentPingsByType"];
-
-function fakeSetup() {
-  studyUtils.setup({
-    study: {
-      studyName: "shield-utils-test",
-      endings: {
-        "expired": {
-          "baseUrl": "http://www.example.com/?reason=expired",
-        },
-      },
-      telemetry: { send: true, removeTestingFlag: false },
-    },
-    log: {
-      // Fatal: 70, Error: 60, Warn: 50, Info: 40, Config: 30, Debug: 20, Trace: 10, All: -1,
-      studyUtils: {
-        level: "Warn",
-      },
-    },
-    addon: {id: "1", version: "1"},
-  });
-  studyUtils.setVariation({ name: "puppers", weight: "2" });
-}
-
-// Returns array of pings of type `type` in sorted order by timestamp
-// first element is most recent ping
-async function getMostRecentPingsByType(type) {
-  const pings = await TelemetryArchive.promiseArchivedPingList();
-
-  const filteredPings = pings.filter(p => p.type === type);
-  filteredPings.sort((a, b) => b.timestampCreated - a.timestampCreated);
-
-  const pingData = filteredPings.map(ping => TelemetryArchive.promiseArchivedPingById(ping.id));
-  return Promise.all(pingData);
-}
diff --git a/test/shield_utils_test.js b/test/shield_utils_test.js
deleted file mode 100644
index d54b2ec..0000000
--- a/test/shield_utils_test.js
+++ /dev/null
@@ -1,188 +0,0 @@
-/* eslint-env node, mocha */
-
-const assert = require("assert");
-const utils = require("./utils");
-const firefox = require("selenium-webdriver/firefox");
-const Context = firefox.Context;
-
-// TODO create new profile per test?
-// then we can test with a clean profile every time
-
-describe("Shield Study Utils Functional Tests", function() {
-  // This gives Firefox time to start, and us a bit longer during some of the tests.
-  this.timeout(15000);
-
-  let driver;
-
-  before(async() => {
-    driver = await utils.promiseSetupDriver();
-    // install the addon (note: returns addon id)
-    await utils.installAddon(driver);
-  });
-
-  after(() => driver.quit());
-
-  it("should return the correct variation", async() => {
-    const variation = await driver.executeAsyncScript(async(callback) => {
-      const { studyUtils } = Components.utils.import("resource://test-addon/StudyUtils.jsm", {});
-      // TODO move this to a Config.jsm file
-      const studyConfig = {
-        studyName: "shieldStudyUtilsTest",
-        "weightedVariations": [
-          {"name": "control",
-            "weight": 1},
-          {"name": "kittens",
-            "weight": 1.5},
-          {"name": "puppers",
-            "weight": 2},  // we want more puppers in our sample
-        ],
-      };
-
-      const sample = studyUtils.sample;
-      const hashFraction = await sample.hashFraction("test");
-      const chosenVariation = await sample.chooseWeighted(studyConfig.weightedVariations, hashFraction);
-      callback(chosenVariation);
-    });
-    assert(variation.name === "puppers");
-  });
-
-  it("telemetry should be working", async() => {
-    const shieldTelemetryPing = await driver.executeAsyncScript(async(callback) => {
-      const { fakeSetup, getMostRecentPingsByType } = Components.utils.import("resource://test-addon/utils.jsm", {});
-      const { studyUtils } = Components.utils.import("resource://test-addon/StudyUtils.jsm", {});
-      Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
-
-      fakeSetup();
-
-      await studyUtils.telemetry({ "foo": "bar" });
-
-      // TODO Fix this hackiness; caused by addClientId option in submitExternalPing
-      // The ping seems to be sending (appears in about:telemetry) but does not appear
-      // in the pings array
-      await new Promise(resolve => setTimeout(resolve, 1000));
-
-      const shieldPings = await getMostRecentPingsByType("shield-study-addon");
-      callback(shieldPings[0]);
-    });
-    assert(shieldTelemetryPing.payload.data.attributes.foo === "bar");
-  });
-
-  describe("test the library's \"startup\" process", function() {
-    it("should send the correct ping on first seen", async() => {
-      const firstSeenPing = await driver.executeAsyncScript(async(callback) => {
-        const { fakeSetup, getMostRecentPingsByType } = Components.utils.import("resource://test-addon/utils.jsm", {});
-        const { studyUtils } = Components.utils.import("resource://test-addon/StudyUtils.jsm", {});
-        Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
-
-        fakeSetup();
-
-        studyUtils.firstSeen();
-
-        const studyPings = await getMostRecentPingsByType("shield-study");
-        callback(studyPings[0]);
-      });
-      assert(firstSeenPing.payload.data.study_state === "enter");
-    });
-
-    it("should set the experiment to active in Telemetry", async() => {
-      const activeExperiments = await driver.executeAsyncScript(async(callback) => {
-        const { fakeSetup } = Components.utils.import("resource://test-addon/utils.jsm", {});
-        const { studyUtils } = Components.utils.import("resource://test-addon/StudyUtils.jsm", {});
-        Components.utils.import("resource://gre/modules/TelemetryEnvironment.jsm");
-
-        fakeSetup();
-
-        studyUtils.setActive();
-
-        callback(TelemetryEnvironment.getActiveExperiments());
-      });
-      assert(activeExperiments.hasOwnProperty("shield-utils-test"));
-    });
-
-    it("should send the correct telemetry ping on first install", async() => {
-      const installedPing = await driver.executeAsyncScript(async(callback) => {
-        const { fakeSetup, getMostRecentPingsByType } = Components.utils.import("resource://test-addon/utils.jsm", {});
-        const { studyUtils } = Components.utils.import("resource://test-addon/StudyUtils.jsm", {});
-        Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
-
-        fakeSetup();
-
-        await studyUtils.startup({reason: 5}); // ADDON_INSTALL = 5
-
-        const studyPings = await getMostRecentPingsByType("shield-study");
-        callback(studyPings[0]);
-      });
-      assert(installedPing.payload.data.study_state === "installed");
-    });
-  });
-
-  describe("test the library's endStudy() function", function() {
-    before(async() => {
-      await driver.executeAsyncScript(async(callback) => {
-        const { fakeSetup } = Components.utils.import("resource://test-addon/utils.jsm", {});
-        const { studyUtils } = Components.utils.import("resource://test-addon/StudyUtils.jsm", {});
-
-        fakeSetup();
-
-        // TODO add tests for other reasons (?)
-        await studyUtils.endStudy({reason: "expired", fullname: "TEST_FULLNAME"});
-        callback();
-      });
-    });
-
-    it("should set the experiment as inactive", async() => {
-      const activeExperiments = await driver.executeAsyncScript(async(callback) => {
-        Components.utils.import("resource://gre/modules/TelemetryEnvironment.jsm");
-        callback(TelemetryEnvironment.getActiveExperiments());
-      });
-      assert(!activeExperiments.hasOwnProperty("shield-utils-test"));
-    });
-
-    describe("test the opening of a URL at the end of the study", function() {
-      it("should open a new tab", async() => {
-        const newTabOpened = await driver.wait(async() => {
-          const handles = await driver.getAllWindowHandles();
-          return handles.length === 2; // opened a new tab
-        }, 3000);
-        assert(newTabOpened);
-      });
-
-      it("should open a new tab to the correct URL", async() => {
-        const currentHandle = await driver.getWindowHandle();
-        driver.setContext(Context.CONTENT);
-        // Find the new window handle.
-        let newWindowHandle = null;
-        const handles = await driver.getAllWindowHandles();
-        for (const handle of handles) {
-          if (handle !== currentHandle) {
-            newWindowHandle = handle;
-          }
-        }
-        const correctURLOpened = await driver.wait(async() => {
-          await driver.switchTo().window(newWindowHandle);
-          const currentURL = await driver.getCurrentUrl();
-          return currentURL.startsWith("http://www.example.com/?reason=expired");
-        });
-        assert(correctURLOpened);
-      });
-    });
-
-    it("should send the correct reason telemetry", async() => {
-      const pings = await driver.executeAsyncScript(async(callback) => {
-        const { getMostRecentPingsByType } = Components.utils.import("resource://test-addon/utils.jsm", {});
-        const studyPings = await getMostRecentPingsByType("shield-study");
-        callback(studyPings[1]); // ping before the most recent ping
-      });
-      assert(pings.payload.data.study_state === "expired");
-    });
-
-    it("should send the uninstall telemetry", async() => {
-      const pings = await driver.executeAsyncScript(async(callback) => {
-        const { getMostRecentPingsByType } = Components.utils.import("resource://test-addon/utils.jsm", {});
-        const studyPings = await getMostRecentPingsByType("shield-study");
-        callback(studyPings[0]);
-      });
-      assert(pings.payload.data.study_state === "exit");
-    });
-  });
-});
diff --git a/test/utils.js b/test/utils.js
deleted file mode 100644
index f06a237..0000000
--- a/test/utils.js
+++ /dev/null
@@ -1,90 +0,0 @@
-/* eslint-env node */
-// The geckodriver package downloads and installs geckodriver for us.
-// We use it by requiring it.
-require("geckodriver");
-// const assert = require("assert");
-const cmd = require("selenium-webdriver/lib/command");
-const firefox = require("selenium-webdriver/firefox");
-const Fs = require("fs-extra");
-const FxRunnerUtils = require("fx-runner/lib/utils");
-const path = require("path");
-const webdriver = require("selenium-webdriver");
-
-// const By = webdriver.By;
-const Context = firefox.Context;
-// const until = webdriver.until;
-
-// Note: Geckodriver already has quite a good set of default preferences
-// for disabling various items.
-// https://github.com/mozilla/geckodriver/blob/master/src/marionette.rs
-const FIREFOX_PREFERENCES = {
-  // Ensure e10s is turned on.
-  "browser.tabs.remote.autostart": true,
-  "browser.tabs.remote.autostart.1": true,
-  "browser.tabs.remote.autostart.2": true,
-  // These are good to have set up if you're debugging tests with the browser
-  // toolbox.
-  "devtools.chrome.enabled": true,
-  "devtools.debugger.remote-enabled": true,
-  "devtools.debugger.prompt-connection": false,
-  "general.warnOnAboutConfig": false
-};
-
-// useful if we need to test on a specific version of Firefox
-async function promiseActualBinary(binary) {
-  try {
-    const normalizedBinary = await FxRunnerUtils.normalizeBinary(binary);
-    await Fs.stat(normalizedBinary);
-    return normalizedBinary;
-  } catch (ex) {
-    if (ex.code === "ENOENT") {
-      throw new Error(`Could not find ${binary}`);
-    }
-    throw ex;
-  }
-}
-
-module.exports.promiseSetupDriver = async() => {
-  const profile = new firefox.Profile();
-
-  Object.keys(FIREFOX_PREFERENCES).forEach((key) => {
-    profile.setPreference(key, FIREFOX_PREFERENCES[key]);
-  });
-
-  const options = new firefox.Options();
-  options.setProfile(profile);
-
-  const builder = new webdriver.Builder()
-    .forBrowser("firefox")
-    .setFirefoxOptions(options);
-
-  const binaryLocation = await promiseActualBinary(process.env.FIREFOX_BINARY || "firefox");
-  await options.setBinary(new firefox.Binary(binaryLocation));
-  const driver = await builder.build();
-  driver.setContext(Context.CHROME);
-  return driver;
-};
-
-module.exports.installAddon = async(driver) => {
-  // references:
-  //    https://bugzilla.mozilla.org/show_bug.cgi?id=1298025
-  //    https://github.com/mozilla/geckodriver/releases/tag/v0.17.0
-  const fileLocation = path.join(process.cwd(), process.env.XPI_NAME);
-  const executor = driver.getExecutor();
-  executor.defineCommand("installAddon", "POST", "/session/:sessionId/moz/addon/install");
-  const installCmd = new cmd.Command("installAddon");
-
-  const session = await driver.getSession();
-  installCmd.setParameters({ sessionId: session.getId(), path: fileLocation, temporary: true });
-  return executor.execute(installCmd);
-};
-
-module.exports.uninstallAddon = async(driver, id) => {
-  const executor = driver.getExecutor();
-  executor.defineCommand("uninstallAddon", "POST", "/session/:sessionId/moz/addon/uninstall");
-  const uninstallCmd = new cmd.Command("uninstallAddon");
-
-  const session = await driver.getSession();
-  uninstallCmd.setParameters({ sessionId: session.getId(), id });
-  await executor.execute(uninstallCmd);
-};
diff --git a/testUtils/executeJs.js b/testUtils/executeJs.js
new file mode 100644
index 0000000..1e56acd
--- /dev/null
+++ b/testUtils/executeJs.js
@@ -0,0 +1,91 @@
+/* eslint-env node */
+
+const firefox = require("selenium-webdriver/firefox");
+const Context = firefox.Context;
+
+/**
+ * The tests rely on the add-on's background script opening up
+ * an extension page in a new window/tab.
+ *
+ * In background.js, make it possible for your tests to execute
+ * the following at some point:
+ *
+ *   const createData = {
+ *     type: "detached_panel",
+ *     url: "extension-page-for-tests/index.html",
+ *     width: 500,
+ *     height: 500,
+ *   };
+ *   browser.windows.create(createData);
+ *
+ * Extension pages get access to all the same privileged
+ * WebExtension APIs as the background scripts, allowing us
+ * to run tests directly against those APIs.
+ *
+ * This variable sets the expected path of this extension page so
+ * that we can check if we are in the right context to run tests.
+ *
+ * TODO: Find a cleaner way to accomplish this
+ * @type {string}
+ */
+const extensionPagePath = "/extension-page-for-tests/index.html";
+
+module.exports.executeJs = {
+  /**
+   * Executes JavaScript with access to all the same privileged
+   * WebExtension APIs as the background scripts, allowing us
+   * to run tests directly against those APIs.
+   *
+   * @param driver
+   * @param callable
+   * @returns {Promise<*>}
+   */
+  executeAsyncScriptInExtensionPageForTests: async (driver, callable) => {
+    driver.setContext(Context.CONTENT);
+
+    const checkIfCurrentlyInExtensionPageWindow = async () => {
+      let currentUrl = await driver.getCurrentUrl();
+      return currentUrl.indexOf(extensionPagePath) > 0;
+    };
+
+    const isCurrentlyInExtensionPageWindow = await checkIfCurrentlyInExtensionPageWindow();
+
+    // Wait for the extension page window to be available
+    // (we may still be loading firefox/the add-on)
+    if (!isCurrentlyInExtensionPageWindow) {
+      await driver.wait(
+        async function() {
+          const handles = await driver.getAllWindowHandles();
+          return handles.length === 2;
+        },
+        9000,
+        "Should have opened a popup",
+      );
+
+      const handles = await driver.getAllWindowHandles();
+      const currentHandle = await driver.getWindowHandle();
+
+      // Find the new window handle.
+      let newWindowHandle = null;
+      for (const handle of handles) {
+        if (handle !== currentHandle) {
+          newWindowHandle = handle;
+        }
+      }
+
+      // Switch to the extension page popup
+      await driver.switchTo().window(newWindowHandle);
+
+      // Check the tab has loaded the right page.
+      // We use driver.wait to wait for the page to be loaded, since we
+      // are not able to easily use the load listeners built into selenium.
+      await driver.wait(
+        checkIfCurrentlyInExtensionPageWindow,
+        10000,
+        "Should have loaded the extension page for tests",
+      );
+    }
+
+    return await driver.executeAsyncScript(callable);
+  },
+};
diff --git a/testUtils/nav.js b/testUtils/nav.js
new file mode 100644
index 0000000..75a7a40
--- /dev/null
+++ b/testUtils/nav.js
@@ -0,0 +1,13 @@
+/* eslint-env node */
+
+const firefox = require("selenium-webdriver/firefox");
+const Context = firefox.Context;
+
+module.exports.nav = {
+  gotoURL: async (driver, url) => {
+    // navigate to a regular page
+    driver.setContext(Context.CONTENT);
+    await driver.get(url);
+    driver.setContext(Context.CHROME);
+  },
+};
diff --git a/testUtils/pings.js b/testUtils/pings.js
new file mode 100644
index 0000000..52d095f
--- /dev/null
+++ b/testUtils/pings.js
@@ -0,0 +1,100 @@
+/* eslint-env node */
+
+module.exports.pings = {
+  /** Returns array of pings of type `type` in reverse sorted order by timestamp
+   * first element is most recent ping
+   *
+   * as seen in shield-study-addon-util's `utils.jsm`
+   * options
+   * - type:  string or array of ping types
+   * - n:  positive integer. at most n pings.
+   * - timestamp:  only pings after this timestamp.
+   * - headersOnly: boolean, just the 'headers' for the pings, not the full bodies.
+   */
+  getTelemetryPings: async (driver, passedOptions) => {
+    // callback is how you get the return back from the script
+    return driver.executeAsyncScript(async (options, callback) => {
+      let { type } = options;
+      const { n, timestamp, headersOnly } = options;
+      Components.utils.import("resource://gre/modules/TelemetryArchive.jsm");
+      // {type, id, timestampCreated}
+      let pings = await TelemetryArchive.promiseArchivedPingList();
+      if (type) {
+        if (!(type instanceof Array)) {
+          type = [type]; // Array-ify if it's a string
+        }
+      }
+      if (type) pings = pings.filter(p => type.includes(p.type));
+
+      if (timestamp) pings = pings.filter(p => p.timestampCreated > timestamp);
+
+      pings.sort((a, b) => b.timestampCreated - a.timestampCreated);
+      if (n) pings = pings.slice(0, n);
+      const pingData = headersOnly
+        ? pings
+        : pings.map(ping => TelemetryArchive.promiseArchivedPingById(ping.id));
+
+      callback(await Promise.all(pingData));
+    }, passedOptions);
+  },
+
+  getShieldPingsAfterTimestamp: async (driver, ts) => {
+    return getTelemetryPings(driver, {
+      type: ["shield-study", "shield-study-addon"],
+      timestamp: ts,
+    });
+  },
+
+  summarizePings: pings => {
+    return pings.map(p => [p.payload.type, p.payload.data]);
+  },
+
+  pingsReport: async pings => {
+    if (pings.length === 0) {
+      return { report: "No pings found" };
+    }
+    const p0 = pings[0].payload;
+    // print common fields
+    const report =
+      `
+// common fields
+
+branch        ${p0.branch}
+study_name    ${p0.study_name}
+addon_version ${p0.addon_version}
+version       ${p0.version}
+
+` +
+      pings
+        .map(
+          (p, i) => `${i} ${p.creationDate} ${p.payload.type}
+${JSON.stringify(p.payload.data, null, 2)}
+
+`,
+        )
+        .join("\n");
+
+    return { report };
+  },
+
+  searchTelemetry: (conditionArray, telemetryArray) => {
+    const resultingPings = [];
+    for (const condition of conditionArray) {
+      const index = telemetryArray.findIndex(ping => condition(ping));
+      if (index === -1) {
+        throw new this.SearchError(condition);
+      }
+      resultingPings.push(telemetryArray[index]);
+    }
+    return resultingPings;
+  },
+
+  SearchError: class extends Error {
+    constructor(condition) {
+      const message = `Could not find ping satisfying condition: ${condition.toString()}`;
+      super(message);
+      this.message = message;
+      this.name = "SearchError";
+    }
+  },
+};
diff --git a/testUtils/setup.js b/testUtils/setup.js
new file mode 100644
index 0000000..44948d3
--- /dev/null
+++ b/testUtils/setup.js
@@ -0,0 +1,94 @@
+/* eslint-env node */
+
+const cmd = require("selenium-webdriver/lib/command");
+const firefox = require("selenium-webdriver/firefox");
+const webdriver = require("selenium-webdriver");
+const FxRunnerUtils = require("fx-runner/lib/utils");
+const Fs = require("fs-extra");
+const path = require("path");
+const Context = firefox.Context;
+
+// useful if we need to test on a specific version of Firefox
+async function promiseActualBinary(binary) {
+  try {
+    let normalizedBinary = await FxRunnerUtils.normalizeBinary(binary);
+    normalizedBinary = path.resolve(normalizedBinary);
+    await Fs.stat(normalizedBinary);
+    return normalizedBinary;
+  } catch (ex) {
+    if (ex.code === "ENOENT") {
+      throw new Error(`Could not find ${binary}`);
+    }
+    throw ex;
+  }
+}
+
+module.exports.setup = {
+  /**
+   * Uses process.env.FIREFOX_BINARY
+   */
+  promiseSetupDriver: async FIREFOX_PREFERENCES => {
+    const profile = new firefox.Profile();
+
+    // TODO, allow 'actually send telemetry' here.
+    Object.keys(FIREFOX_PREFERENCES).forEach(key => {
+      profile.setPreference(key, FIREFOX_PREFERENCES[key]);
+    });
+
+    // TODO glind, allow config to re-use profile
+    const options = new firefox.Options();
+    options.setProfile(profile);
+
+    const builder = new webdriver.Builder()
+      .forBrowser("firefox")
+      .setFirefoxOptions(options);
+
+    const binaryLocation = await promiseActualBinary(
+      process.env.FIREFOX_BINARY || "firefox",
+    );
+    await options.setBinary(new firefox.Binary(binaryLocation));
+    const driver = await builder.build();
+    // Firefox will be started up by now
+    driver.setContext(Context.CHROME);
+    return driver;
+  },
+
+  installAddon: async (driver, fileLocation) => {
+    // references:
+    //    https://bugzilla.mozilla.org/show_bug.cgi?id=1298025
+    //    https://github.com/mozilla/geckodriver/releases/tag/v0.17.0
+    fileLocation =
+      fileLocation || path.join(process.cwd(), process.env.ADDON_ZIP);
+
+    const executor = driver.getExecutor();
+    executor.defineCommand(
+      "installAddon",
+      "POST",
+      "/session/:sessionId/moz/addon/install",
+    );
+    const installCmd = new cmd.Command("installAddon");
+
+    const session = await driver.getSession();
+    installCmd.setParameters({
+      sessionId: session.getId(),
+      path: fileLocation,
+      temporary: true,
+    });
+    await executor.execute(installCmd);
+    console.log(`Add-on at ${fileLocation} installed`);
+  },
+
+  uninstallAddon: async (driver, id) => {
+    const executor = driver.getExecutor();
+    executor.defineCommand(
+      "uninstallAddon",
+      "POST",
+      "/session/:sessionId/moz/addon/uninstall",
+    );
+    const uninstallCmd = new cmd.Command("uninstallAddon");
+
+    const session = await driver.getSession();
+    uninstallCmd.setParameters({ sessionId: session.getId(), id });
+    await executor.execute(uninstallCmd);
+  },
+};
diff --git a/testUtils/ui.js b/testUtils/ui.js
new file mode 100644
index 0000000..e397c0b
--- /dev/null
+++ b/testUtils/ui.js
@@ -0,0 +1,120 @@
+/* eslint-env node */
+
+const webdriver = require("selenium-webdriver");
+const firefox = require("selenium-webdriver/firefox");
+const Context = firefox.Context;
+const until = webdriver.until;
+
+/* Firefox UI testing helper functions */
+module.exports.ui = {
+  promiseManifest: async () => {
+    const manifestJson = await Fs.readFile(
+      path.resolve("src/manifest.json"),
+      "utf8",
+    );
+    return JSON.parse(manifestJson);
+  },
+
+  /**
+   * The widget id is used to identify add-on specific chrome elements. Examples:
+   *  - Browser action - {addonWidgetId}-browser-action
+   *  - Page action - {addonWidgetId}-page-action
+   * Search for makeWidgetId(extension.id) in the Firefox source code for more examples.
+   * @returns {Promise<*>}
+   */
+  addonWidgetId: async () => {
+    /**
+     * From firefox/browser/components/extensions/ExtensionPopups.jsm
+     */
+    function makeWidgetId(id) {
+      id = id.toLowerCase();
+      // FIXME: This allows for collisions.
+      return id.replace(/[^a-z0-9_-]/g, "_");
+    }
+
+    const manifest = await promiseManifest();
+    return makeWidgetId(manifest.applications.gecko.id);
+  },
+
+  takeScreenshot: async (driver, filepath = "./screenshot.png") => {
+    try {
+      const data = await driver.takeScreenshot();
+      return await Fs.outputFile(filepath, data, "base64");
+    } catch (screenshotError) {
+      throw screenshotError;
+    }
+  },
+
+  MODIFIER_KEY: (function getModifierKey() {
+    const modifierKey =
+      process.platform === "darwin"
+        ? webdriver.Key.COMMAND
+        : webdriver.Key.CONTROL;
+    return modifierKey;
+  })(),
+
+  // TODO glind, this interface feels janky
+  // this feels like it wants to be $ like.
+  // not obvious right now, moving on!
+  getChromeElementBy: class {
+    static async _get1(driver, method, selector) {
+      driver.setContext(Context.CHROME);
+      try {
+        return await driver.wait(
+          until.elementLocated(By[method](selector)),
+          1000,
+        );
+      } catch (e) {
+        // if there an error, the button was not found
+        console.error(e);
+        return null;
+      }
+    }
+
+    static async id(driver, id) {
+      return this._get1(driver, "id", id);
+    }
+
+    static async className(driver, className) {
+      return this._get1(driver, "className", className);
+    }
+
+    static async tagName(driver, tagName) {
+      return this._get1(driver, "tagName", tagName);
+    }
+  },
+
+  promiseUrlBar: driver => {
+    driver.setContext(Context.CHROME);
+    return driver.wait(until.elementLocated(By.id("urlbar")), 1000);
+  },
+
+  // such as:  "social-share-button"
+  addButtonFromCustomizePanel: async (driver, buttonId) =>
+    driver.executeAsyncScript(callback => {
+      // see https://dxr.mozilla.org/mozilla-central/rev/211d4dd61025c0a40caea7a54c9066e051bdde8c/browser/base/content/browser-social.js#193
+      Components.utils.import("resource:///modules/CustomizableUI.jsm");
+      CustomizableUI.addWidgetToArea(buttonId, CustomizableUI.AREA_NAVBAR);
+      callback();
+    }),
+
+  removeButtonFromNavbar: async (driver, buttonId) => {
+    driver.setContext(Context.CONTENT);
+    try {
+      await driver.executeAsyncScript(callback => {
+        Components.utils.import("resource:///modules/CustomizableUI.jsm");
+        CustomizableUI.removeWidgetFromArea(buttonId);
+        callback();
+      });
+
+      // TODO glind fix this, I think this is supposed to prove it's dead.
+      const button = await this.promiseAddonButton(driver);
+      return button === null;
+    } catch (e) {
+      if (e.name === "TimeoutError") {
+        return false;
+      }
+      throw e;
+    }
+  },
+};
diff --git a/testUtils/wip.js b/testUtils/wip.js
new file mode 100644
index 0000000..5ccdcca
--- /dev/null
+++ b/testUtils/wip.js
@@ -0,0 +1,98 @@
+/* eslint-env node */
+/* eslint no-console:off */
+
+const firefox = require("selenium-webdriver/firefox");
+const Context = firefox.Context;
+const until = webdriver.until;
+
+// TODO glind general wrapper for 'async with callback'?
+
+/* this is NOT WORKING FOR UNKNOWN HARD TO EXLAIN REASONS
+=> Uncaught WebDriverError: InternalError: too much recursion
+module.exports.allAddons = async(driver) => {
+  // callback is how you get the return back from the script
+  return driver.executeAsyncScript(async(callback,) => {
+    Components.utils.import("resource://gre/modules/AddonManager.jsm");
+    const L = await AddonManager.getAllAddons();
+    callback(await L);
+  });
+};
+*/
+
+// TODO glind, specific to share-button-study but useful to demo patterns.
+// TODO glind, generalize, document, or destroy
+
+// module.exports.copyUrlBar = async(driver) => {
+//   const urlBar = await getChromeElementBy.id(driver,'urlbar');
+//   const urlBar = await module.exports.promiseUrlBar(driver);
+//   await urlBar.sendKeys(webdriver.Key.chord(MODIFIER_KEY, "A"));
+//   await urlBar.sendKeys(webdriver.Key.chord(MODIFIER_KEY, "C"));
+// };
+
+// module.exports.testAnimation = async(driver) => {
+//   const button = await module.exports.promiseAddonButton(driver);
+//   if (button === null) { return { hasClass: false, hasColor: false }; }
+//
+//   const buttonClassString = await button.getAttribute("class");
+//   const buttonColor = await button.getCssValue("background-color");
+//
+//   const hasClass = buttonClassString.split(" ").includes("social-share-button-on");
+//   const hasColor = buttonColor.includes("43, 153, 255");
+//   return { hasClass, hasColor };
+// };
+
+// module.exports.waitForClassAdded = async(driver) => {
+//  try {
+//    const animationTest = await driver.wait(async() => {
+//      const { hasClass } = await module.exports.testAnimation(driver);
+//      return hasClass;
+//    }, 1000);
+//    return animationTest;
+//  } catch (e) {
+//    if (e.name === "TimeoutError") { return null; }
+//    throw (e);
+//  }
+// };
+//
+// module.exports.waitForAnimationEnd = async(driver) => {
+//  try {
+//    return await driver.wait(async() => {
+//      const { hasClass, hasColor } = await module.exports.testAnimation(driver);
+//      return !hasClass && !hasColor;
+//    }, 1000);
+//  } catch (e) {
+//    if (e.name === "TimeoutError") { return null; }
+//    throw (e);
+//  }
+// };
+
+// module.exports.testPanel = async(driver, panelId) => {
+//   driver.setContext(Context.CHROME);
+//   try { // if we can't find the panel, return false
+//     return await driver.wait(async() => {
+//       // need to execute JS, since state is not an HTML attribute, it's a property
+//       const panelState = await driver.executeAsyncScript((panelIdArg, callback) => {
+//         const shareButtonPanel = window.document.getElementById(panelIdArg);
+//         if (shareButtonPanel === null) {
+//           callback(null);
+//         } else {
+//           const state = shareButtonPanel.state;
+//           callback(state);
+//         }
+//       }, panelId);
+//       return panelState === "open";
+//     }, 1000);
+//   } catch (e) {
+//     if (e.name === "TimeoutError") { return null; }
+//     throw e;
+//   }
+// };
+
+// module.exports.closePanel = async(driver, target = null) => {
+//   if (target !== null) {
+//     target.sendKeys(webdriver.Key.ESCAPE);
+//   } else {
+//     const urlbar = await module.exports.promiseUrlBar(driver);
+//     await urlbar.sendKeys(webdriver.Key.ESCAPE);
+//   }
+// };
diff --git a/webExtensionApis/prefs/api.js b/webExtensionApis/prefs/api.js
new file mode 100644
index 0000000..aef5915
--- /dev/null
+++ b/webExtensionApis/prefs/api.js
@@ -0,0 +1,50 @@
+"use strict";
+
+ChromeUtils.import("resource://gre/modules/Services.jsm");
+
+const PREFERENCES_PREFIX = "";
+
+function get(key, type = "char") {
+  key = PREFERENCES_PREFIX + key;
+
+  switch (type) {
+    case "char":
+      return Services.prefs.getCharPref(key);
+    case "bool":
+      return Services.prefs.getBoolPref(key);
+    case "int":
+      return Services.prefs.getIntPref(key);
+  }
+
+  throw new Error(`Unknown type: ${type}`);
+}
+
+function set(key, type, value) {
+  key = PREFERENCES_PREFIX + key;
+
+  switch (type) {
+    case "char":
+      return Services.prefs.setCharPref(key, value);
+    case "bool":
+      return Services.prefs.setBoolPref(key, value);
+    case "int":
+      return Services.prefs.setIntPref(key, value);
+  }
+  throw new Error(`Unknown type: ${type}`);
+}
+
+/* https://firefox-source-docs.mozilla.org/toolkit/components/extensions/webextensions/functions.html */
+this.prefs = class extends ExtensionAPI {
+  getAPI(context) {
+    return {
+      prefs: {
+        async get(prefName) {
+          return "getting";
+        },
+        async set(prefName, value) {
+          return "set";
+        },
+      },
+    };
+  }
+};
diff --git a/webExtensionApis/prefs/schema.json b/webExtensionApis/prefs/schema.json
new file mode 100644
index 0000000..605c449
--- /dev/null
+++ b/webExtensionApis/prefs/schema.json
@@ -0,0 +1,36 @@
+[
+  {
+    "namespace": "prefs",
+    "description": "Pref get, set, watch, unwatch(?)",
+    "functions": [
+      {
+        "name": "get",
+        "type": "function",
+        "description": "Returns the value of a pref",
+        "async": true,
+        "parameters": [
+          {
+            "name": "prefName",
+            "type": "string"
+          }
+        ]
+      },
+      {
+        "name": "set",
+        "type": "function",
+        "description": "Sets the value of a pref",
+        "async": true,
+        "parameters": [
+          {
+            "name": "prefName",
+            "type": "string"
+          },
+          {
+            "name": "value",
+            "type": "any"
+          }
+        ]
+      }
+    ]
+  }
+]
diff --git a/webExtensionApis/study/.gitignore b/webExtensionApis/study/.gitignore
new file mode 100644
index 0000000..2e3f83a
--- /dev/null
+++ b/webExtensionApis/study/.gitignore
@@ -0,0 +1 @@
+/api.js
diff --git a/webExtensionApis/study/schema.json b/webExtensionApis/study/schema.json
new file mode 100644
index 0000000..1807617
--- /dev/null
+++ b/webExtensionApis/study/schema.json
@@ -0,0 +1,76 @@
+[
+  {
+    "namespace": "study",
+    "description": "study",
+    "functions": [
+      {
+        "name": "configure",
+        "type": "function",
+        "description": "TODO",
+        "async": true,
+        "parameters": [
+          {
+            "name": "studySetup",
+            "type": "any"
+          }
+        ]
+      },
+      {
+        "name": "deterministicVariation",
+        "type": "function",
+        "description": "TODO",
+        "async": true,
+        "parameters": [
+          {
+            "name": "weightedVariations",
+            "type": "any"
+          },
+          {
+            "optional": true,
+            "name": "fraction",
+            "type": "any"
+          }
+        ]
+      },
+      {
+        "name": "startup",
+        "type": "function",
+        "description": "TODO",
+        "async": true,
+        "parameters": []
+      },
+      {
+        "name": "info",
+        "type": "function",
+        "description": "TODO",
+        "async": true,
+        "parameters": []
+      },
+      {
+        "name": "telemetry",
+        "type": "function",
+        "description": "TODO",
+        "async": true,
+        "parameters": [
+          {
+            "name": "data",
+            "type": "any"
+          }
+        ]
+      },
+      {
+        "name": "endStudy",
+        "type": "function",
+        "description": "TODO",
+        "async": true,
+        "parameters": [
+          {
+            "optional": true,
+            "name": "data",
+            "type": "any"
+          }
+        ]
+      }
+    ]
+  }
+]
diff --git a/webExtensionApis/study/src/index.js b/webExtensionApis/study/src/index.js
new file mode 100644
index 0000000..53ddf6b
--- /dev/null
+++ b/webExtensionApis/study/src/index.js
@@ -0,0 +1,122 @@
+/* eslint-env commonjs */
+
+/* global ExtensionAPI */
+
+this.study = class extends ExtensionAPI {
+  /**
+   * We don't need to override the constructor for other
+   * reasons than to clarify the class member "extension"
+   * being of type Extension
+   *
+   * @param extension Extension
+   */
+  constructor(extension) {
+    super(extension);
+    /**
+     * @type Extension
+     */
+    this.extension = extension;
+  }
+
+  /**
+   * Extension Shutdown
+   * APIs that allocate any resources (e.g., adding elements to the browser’s
+   * user interface, setting up internal event listeners, etc.) must free
+   * these resources when the extension for which they are allocated is
+   * shut down.
+   */
+  onShutdown(shutdownReason) {
+    console.log("onShutdown", shutdownReason);
+    // TODO: debootstrap study
+  }
+
+  getAPI(context) {
+    const { studyUtils } = require("./studyUtils.js");
+    const studyUtilsBootstrap = require("./studyUtilsBootstrap.js");
+    // const { PioneerUtils } = require("pioneer-utils/PioneerUtils.jsm");
+    // const pioneerUtilsBootstrap = require("./pioneerUtilsBootstrap.js");
+
+    let bootstrap;
+
+    const { extension } = this;
+
+    return {
+      study: {
+        /**
+         * ensure we have configured study
+         * and are supposed to run our feature
+         * @returns {Promise<void>}
+         */
+        async configure(studySetup) {
+          bootstrap = studyUtilsBootstrap.Bootstrap(studySetup, studyUtils);
+          await bootstrap.configure(extension);
+        },
+
+        async startup() {
+          await bootstrap.startup(extension);
+        },
+
+        async deterministicVariation(weightedVariations, fraction) {
+          if (typeof fraction === "string") {
+            fraction = parseFloat(fraction);
+          }
+          return await studyUtils.deterministicVariation(
+            weightedVariations,
+            fraction,
+          );
+        },
+
+        /**
+         * current studyUtils configuration, including 'variation'
+         * @returns {Promise<void>}
+         */
+        async info() {
+          return studyUtils.info();
+        },
+
+        /**
+         *
+         * `telemetry`
+         *
+         * - check all pings for validity as "shield-study-addon" pings
+         * - send a 'shield-study-addon' packet
+         *
+         * Good practice: send all Telemetry from one function for easier
+         * logging, debugging, validation
+         *
+         * Note: keys, values must be strings to fulfill the
+         *   `shield-study-addon` ping-type validation.
+         *   This allows `payload.data.attributes` to store
+         *   correctly at Parquet at s.t.m.o.
+         *
+         *   Bold claim:  catching errors here
+         *
+         */
+        async telemetry(data) {
+          function throwIfInvalid(obj) {
+            // Check: all keys and values must be strings,
+            for (const k in obj) {
+              if (typeof k !== "string")
+                throw new Error(`key ${k} not a string`);
+              if (typeof obj[k] !== "string")
+                throw new Error(`value ${k} ${obj[k]} not a string`);
+            }
+            return true;
+          }
+
+          throwIfInvalid(data);
+          studyUtils.telemetry(data);
+        },
+
+        /**
+         * for ending a study
+         * @param data
+         * @returns {Promise<void>}
+         */
+        async endStudy(data) {
+          studyUtils.endStudy(data);
+        },
+      },
+    };
+  }
+};
diff --git a/webExtensionApis/study/src/jsonschema.js b/webExtensionApis/study/src/jsonschema.js
new file mode 100644
index 0000000..45b44a9
--- /dev/null
+++ b/webExtensionApis/study/src/jsonschema.js
@@ -0,0 +1,31 @@
+const Ajv = require("ajv/dist/ajv.min.js");
+const ajv = new Ajv();
+
+const jsonschema = {
+  /**
+   * Validates input data based on a specified schema
+   * @param {Object} data - The data to be validated
+   * @param {Object} schema - The schema to validate against
+   * @returns {boolean} - Will return true if the data is valid
+   */
+  validate(data, schema) {
+    const valid = ajv.validate(schema, data);
+    return { valid, errors: ajv.errors || [] };
+  },
+  /**
+   * Validates input data based on a specified schema
+   * @param {Object} data - The data to be validated
+   * @param {Object} schema - The schema to validate against
+   * @throws Will throw an error if the data is not valid
+   * @returns {boolean} - Will return true if the data is valid
+   */
+  validateOrThrow(data, schema) {
+    const valid = ajv.validate(schema, data);
+    if (!valid) {
+      throw new Error(JSON.stringify(ajv.errors));
+    }
+    return true;
+  },
+};
+
+export default jsonschema;
diff --git a/webExtensionApis/study/src/sampling.js b/webExtensionApis/study/src/sampling.js
new file mode 100644
index 0000000..027ab19
--- /dev/null
+++ b/webExtensionApis/study/src/sampling.js
@@ -0,0 +1,105 @@
+import jsonschema from "./jsonschema";
+import schemas from "./schemas";
+
+const { utils: Cu } = Components;
+Cu.import("resource://gre/modules/Services.jsm");
+const { TextEncoder } = Cu.getGlobalForObject(Services);
+
+/**
+ * Given sample weights (weightedVariations) and a particular position
+ * (fraction), return a variation.  If no fraction given, return a variation
+ * at random fraction proportional to the weightVariations object
+ * @param {Object[]} weightedVariations - the array of branch name:weight pairs
+ * used to randomly assign the user to a branch
+ * @param {Number} fraction - a number (0 <= fraction < 1)
+ * @returns {Object} - the variation object in weightedVariations for the given
+ * fraction
+ */
+export function chooseWeighted(weightedVariations, fraction = Math.random()) {
+  /*
+   weightedVaiations, list of:
+   {
+    name: string of any length
+    weight: float >= 0
+   }
+  */
+  jsonschema.validateOrThrow(weightedVariations, schemas.weightedVariations);
+
+  const weights = weightedVariations.map(x => x.weight || 1);
+  const partial = cumsum(weights);
+  const total = weights.reduce((a, b) => a + b);
+  for (let ii = 0; ii < weightedVariations.length; ii++) {
+    if (fraction <= partial[ii] / total) {
+      return weightedVariations[ii];
+    }
+  }
+  return null;
+}
+
+/**
+ * @async
+ * Converts a string into a fraction (0 <= fraction < 1) based on the first
+ * X bits of its sha256 hexadecimal representation
+ * Note: Salting (adding the study name to the telemetry clientID) ensures
+ * that the same user gets a different bucket/hash for each study.
+ * Hashing of the salted string ensures uniform hashing; i.e. that every
+ * bucket/variation gets filled.
+ * @param {string} saltedString - a salted string used to create a hash for
+ * the user
+ * @param {Number} bits - The first number of bits to use in the sha256 hex
+ * representation
+ * @returns {Number} - a fraction (0 <= fraction < 1)
+ */
+export async function hashFraction(saltedString, bits = 12) {
+  const hash = await sha256(saltedString);
+  return parseInt(hash.substr(0, bits), 16) / Math.pow(16, bits);
+}
+
+/**
+ * @async
+ * Converts a string into its sha256 hexadecimal representation.
+ * Note: This is ultimately used to make a hash of the user's telemetry clientID
+ * and the study name.
+ * @param {string} message - The message to convert.
+ * @returns {string} - a hexadecimal, 256-bit hash
+ */
+export async function sha256(message) {
+  // encode as UTF-8
+  const msgBuffer = new TextEncoder("utf-8").encode(message);
+  // hash the message
+  const hashBuffer = await crypto.subtle.digest("SHA-256", msgBuffer);
+  // convert ArrayBuffer to Array
+  const hashArray = Array.from(new Uint8Array(hashBuffer));
+  // convert bytes to hex string
+  const hashHex = hashArray
+    .map(b => ("00" + b.toString(16)).slice(-2))
+    .join("");
+  return hashHex;
+}
+
+/**
+ * Converts an array of length N into a cumulative sum array of length N,
+ * where n_i = sum(array.slice(0,i)) i.e. each element is the sum of all
+ * elements up to and including that element
+ * This is ultimately used for turning sample weights (AKA weightedVariations)
+ * into right hand limits (>= X) to  deterministically select which variation
+ * a user receives.
+ * @example [.25,.3,.45] => [.25,.55,1.0]; if a user's sample weight were .25,
+ * they would fall into the left-most bucket
+ * @param {Number[]} arr - An array of sample weights (0 <= sample weight < 1)
+ * @returns {Number[]} - A cumulative sum array of sample weights
+ * (0 <= sample weight <= 1)
+ */
+export function cumsum(arr) {
+  return arr.reduce(function(r, c, i) {
+    r.push((r[i - 1] || 0) + c);
+    return r;
+  }, []);
+}
+
+export default {
+  chooseWeighted,
+  cumsum,
+  hashFraction,
+  sha256,
+};
diff --git a/webExtensionApis/study/src/schemas/index.js b/webExtensionApis/study/src/schemas/index.js
new file mode 100644
index 0000000..9ab0a98
--- /dev/null
+++ b/webExtensionApis/study/src/schemas/index.js
@@ -0,0 +1,9 @@
+/* eslint-env commonjs */
+
+module.exports = {
+  "shield-study": require("shield-study-schemas/schemas-client/shield-study.schema.json"), // eslint-disable-line max-len
+  "shield-study-addon": require("shield-study-schemas/schemas-client/shield-study-addon.schema.json"), // eslint-disable-line max-len
+  "shield-study-error": require("shield-study-schemas/schemas-client/shield-study-error.schema.json"), // eslint-disable-line max-len
+  studySetup: require("./schema.studySetup.json"),
+  weightedVariations: require("./schema.weightedVariations.json"),
+};
diff --git a/src/schema.studySetup.json b/webExtensionApis/study/src/schemas/schema.studySetup.json
similarity index 69%
rename from src/schema.studySetup.json
rename to webExtensionApis/study/src/schemas/schema.studySetup.json
index a061b96..cb90023 100644
--- a/src/schema.studySetup.json
+++ b/webExtensionApis/study/src/schemas/schema.studySetup.json
@@ -1,10 +1,10 @@
 {
   "$schema": "http://json-schema.org/draft-04/schema#",
-  "title":  "study setup",
+  "title": "study setup",
   "type": "object",
   "definitions": {
     "idString": {
-      "description":  "between 1,100 chars, no spaces, unicode ok.",
+      "description": "between 1,100 chars, no spaces, unicode ok.",
       "type": "string",
       "pattern": "^\\S+$",
       "minLength": 1,
@@ -27,12 +27,23 @@
         },
         "study_state_fullname": {
           "type": "string",
-          "description": "Second part of name of state, if any.  Study-specific for study-defined endings."
+          "description":
+            "Second part of name of state, if any.  Study-specific for study-defined endings."
         },
         "url": {
           "type": "string"
         }
       }
+    },
+    "variation": {
+      "name": {
+        "type": "string"
+      },
+      "weight": {
+        "type": "number",
+        "minimum": 0
+      },
+      "required": ["name", "weight"]
     }
   },
   "properties": {
@@ -60,23 +71,19 @@
             },
             "onInvalid": {
               "type": "string",
-              "enum": [
-                "throw",
-                "log"
-              ]
+              "enum": ["throw", "log"]
             }
           },
-          "required": [
-            "removeTestingFlag",
-            "send"
-          ]
+          "required": ["removeTestingFlag", "send"]
         }
       },
-      "required": [
-        "studyName",
-        "endings",
-        "telemetry"
-      ]
+      "required": ["studyName", "endings", "telemetry"]
+    },
+    "weightedVariations": {
+      "items": {
+        "$ref": "#/definitions/variation"
+      },
+      "type": "array"
     },
     "addon": {
       "type": "object",
@@ -90,14 +97,8 @@
           "description": "Semantic version of the addon."
         }
       },
-      "required": [
-        "id",
-        "version"
-      ]
+      "required": ["id", "version"]
     }
   },
-  "required": [
-    "study",
-    "addon"
-  ]
-}
\ No newline at end of file
+  "required": ["study", "weightedVariations", "addon"]
+}
diff --git a/src/schema.weightedVariations.json b/webExtensionApis/study/src/schemas/schema.weightedVariations.json
similarity index 83%
rename from src/schema.weightedVariations.json
rename to webExtensionApis/study/src/schemas/schema.weightedVariations.json
index f6b7cd5..3c7c809 100644
--- a/src/schema.weightedVariations.json
+++ b/webExtensionApis/study/src/schemas/schema.weightedVariations.json
@@ -9,10 +9,7 @@
         "type": "number",
         "minimum": 0
       },
-      "required": [
-        "name",
-        "weight"
-      ]
+      "required": ["name", "weight"]
     }
   },
   "items": {
diff --git a/webExtensionApis/study/src/studyUtils.js b/webExtensionApis/study/src/studyUtils.js
new file mode 100644
index 0000000..d5fc9ba
--- /dev/null
+++ b/webExtensionApis/study/src/studyUtils.js
@@ -0,0 +1,724 @@
+/* eslint-env commonjs */
+
+"use strict";
+
+import sampling from "./sampling";
+
+/*
+* For an overview of what this module does, see ABOUT.md at
+* github.com/mozilla/shield-studies-addon-template
+*
+* Note: There are a number of methods that won't work if the 
+* setup method has not executed (they perform a check with the 
+* `throwIfNotSetup` method). The setup method ensures that the
+* studySetup data passed in is valid per the studySetup schema.
+*/
+
+/*
+* TODO glind survey / urls & query args
+* TODO glind publish as v4
+*/
+const EXPORTED_SYMBOLS = ["studyUtils"];
+
+const UTILS_VERSION = require("../../../package.json").version;
+const PACKET_VERSION = 3;
+
+const { utils: Cu } = Components;
+Cu.import("resource://gre/modules/AddonManager.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.importGlobalProperties(["URL", "crypto", "URLSearchParams"]);
+
+let log;
+const studyUtilsLoggingLevel = "Trace"; // Fatal: 70, Error: 60, Warn: 50, Info: 40, Config: 30, Debug: 20, Trace: 10, All: -1,
+
+// telemetry utils
+const CID = Cu.import("resource://gre/modules/ClientID.jsm", null);
+const { TelemetryController } = Cu.import(
+  "resource://gre/modules/TelemetryController.jsm",
+  null,
+);
+const { TelemetryEnvironment } = Cu.import(
+  "resource://gre/modules/TelemetryEnvironment.jsm",
+  null,
+);
+
+/*
+* Set-up JSON schema validation
+* Schemas are used to validate an input (here, via AJV at runtime)
+* Schemas here are used for:
+*  - Telemetry (Ensure correct Parquet format for different types of
+*    outbound packets):
+*    - "shield-study": shield study state and outcome data common to all
+*      shield studies.
+*    - "shield-study-addon": addon-specific probe data, with `attributes`
+*      (used to capture feature-specific state) sent as Map(string,string).
+*    - "shield-study-error": data used to notify, group and count some kinds
+*      of errors from shield studies
+*  - ShieldUtils API ducktypes:
+*    - "weightedVariations": the array of branch name:weight pairs used to
+*      randomly assign the user
+*    to a branch
+*    - "webExtensionMsg": the message object passed into the
+*      StudyUtils.respondToWebExtensionMessage method
+*    - "studySetup": the options object passed into the StudyUtils.setup method
+*/
+import schemas from "./schemas";
+import jsonschema from "./jsonschema";
+
+/**
+ * Note: This is the deep merge from the addon-sdk (sdk/util/object.js).
+ * Probably deeper than we need. Unlike the shallow merge with the
+ * spread operator (const c = {...a, ...b}), this function can be configured
+ * to copy non-enumerable properties, symbols, and property descriptors.
+ *
+ * Merges all the properties of all arguments into first argument. If two or
+ * more argument objects have own properties with the same name, the property
+ * is overridden, with precedence from right to left, implying, that properties
+ * of the object on the left are overridden by a same named property of the
+ * object on the right.
+ *
+ * Any argument given with "falsy" value - commonly `null` and `undefined` in
+ * case of objects - are skipped.
+ *
+ * @examples
+ *    var a = { bar: 0, a: 'a' }
+ *    var b = merge(a, { foo: 'foo', bar: 1 }, { foo: 'bar', name: 'b' });
+ *    b === a   // true
+ *    b.a       // 'a'
+ *    b.foo     // 'bar'
+ *    b.bar     // 1
+ *    b.name    // 'b'
+ *
+ * @param {...Object} source - two or more object arguments
+ * @returns {Object} - the resulting merged object
+ */
+function merge(source) {
+  const optionsDefault = {
+    names: true,
+    symbols: true,
+    nonEnumerables: true,
+  };
+  /**
+   * Gets object's own property symbols and/or names, including non-enumerables
+   * by default
+   * @param {Object} object - the object for which to get own property symbols
+   * and names
+   * @param {Object} options - object indicating what kinds of properties to
+   * merge
+   * @param {boolean} options.name - True if function should return object's own
+   * property names
+   * @param {boolean} options.symbols - True if function should return
+   * object's own property symbols
+   * @param {boolean} options.nonEnumerables - True if function should return
+   * object's non-enumerable own property names
+   * @returns {string[]|symbol[]} - An array of own property names and/or
+   * symbols for object
+   */
+  function getOwnPropertyIdentifiers(object, options = optionsDefault) {
+    const symbols = !options.symbols
+      ? []
+      : Object.getOwnPropertySymbols(object);
+
+    // eslint-disable-next-line
+    const names = !options.names
+      ? []
+      : options.nonEnumerables
+        ? Object.getOwnPropertyNames(object)
+        : Object.keys(object);
+    return [...names, ...symbols];
+  }
+  /*
+  * descriptor: an object whose own enumerable properties constitute descriptors
+  * for the properties from arguments[1]+ to be defined or modified in
+  * arguments[0]
+  */
+  const descriptor = {};
+  /*
+  * `Boolean` converts the first parameter to a boolean value. Any object is
+  * converted to `true` where `null` and `undefined` becames `false`. Therefore
+  * the `filter` method will keep only objects that are defined and not null.
+  */
+  Array.slice(arguments, 1)
+    .filter(Boolean)
+    .forEach(properties => {
+      getOwnPropertyIdentifiers(properties).forEach(name => {
+        descriptor[name] = Object.getOwnPropertyDescriptor(properties, name);
+      });
+    });
+  return Object.defineProperties(source, descriptor);
+}
+
+/**
+ * Appends a query string to a url.
+ * @param {string} url - a base url to append; must be static (data) or external
+ * @param {Object} args - query arguments, one or more object literal used to
+ * build a query string
+ * @returns {string} - an absolute url appended with a query string
+ */
+function mergeQueryArgs(url, ...args) {
+  // currently left to right
+  // TODO, glind, decide order of merge here
+  // TODO, use Object.assign, or ES7 spread
+  const U = new URL(url);
+  // get the query string already attached to url, if it exists
+  let q = U.search || "?";
+  // create an interface to interact with the query string
+  q = new URLSearchParams(q);
+  const merged = merge({}, ...args);
+  // Set each search parameter in "merged" to its value in the query string,
+  // building up the query string one search parameter at a time.
+  Object.keys(merged).forEach(k => {
+    // k, the search parameter (ex: fxVersion)
+    // q.get(k), returns the value of k, in query string, q (ex: 57.0.1a)
+    log.debug(q.get(k), k, merged[k]);
+    q.set(k, merged[k]);
+  });
+  // append our new query string to the URL object made with "url"
+  U.search = q.toString();
+  // return the full url, with the appended query string
+  return U.toString();
+}
+
+/**
+ * Class representing utilities for shield studies.
+ */
+class StudyUtils {
+  /**
+   * Create a StudyUtils instance.
+   */
+  constructor() {
+    /*
+    * TODO glind Answer: no.  see if you can merge the construtor and setup
+    * and export the class, rather than a singleton
+    */
+    /**
+     * Handles a message received by the webExtension, sending a response back.
+     * @param {Object} webExtensionMsg object, see its schema
+     * @param {boolean} webExtensionMsg.shield - Whether or not the message
+     * is a shield message (intended for StudyUtils)
+     * @param {string} webExtensionMsg.msg - StudyUtils method to be called
+     *from the webExtension
+     * @param {*} webExtensionMsg.data - Data sent from webExtension
+     * @param {Object} sender - Details about the message sender, see
+     * runtime.onMessage MDN docs
+     * @param {responseCallback} sendResponse - The callback to send a response
+     * back to the webExtension
+     * @returns {boolean|undefined} - true if the message has been processed
+     * (shield message) or ignored (non-shield message)
+     */
+    this.respondToWebExtensionMessage = function(
+      { shield, msg, data },
+      sender,
+      sendResponse,
+    ) {
+      // @TODO glind: make sure we're using the webExtensionMsg schema
+      if (!shield) return true;
+      const allowedMethods = ["endStudy", "telemetry", "info"];
+      if (!allowedMethods.includes(msg)) {
+        const errStr1 = "respondToWebExtensionMessage:";
+        const errStr2 = "is not in allowed studyUtils methods:";
+        throw new Error(`${errStr1} "${msg}" ${errStr2} ${allowedMethods}`);
+      }
+      /*
+        * handle async
+        * Execute the StudyUtils method requested by the webExtension
+        * then send the webExtension a response with their return value
+        */
+      Promise.resolve(this[msg](data)).then(
+        function(ans) {
+          log.debug("respondingTo", msg, ans);
+          sendResponse(ans);
+        },
+        // function error eventually
+      );
+      return true;
+      /* Ensure this method is bound to the instance of studyUtils, see
+        * callsite in bootstrap.js
+        * TODO glind: bdanforth's claim: making this function a StudyUtils
+        * method would also do this.
+        */
+    }.bind(this);
+
+    /*
+    * Expose sampling methods onto the exported studyUtils singleton, for use
+    * by any Components.utils-importing module
+    */
+    this.sampling = sampling;
+
+    // expose schemas
+    this.schemas = schemas;
+
+    // expose validation methods
+    this.jsonschema = jsonschema;
+
+    this.REASONS = REASONS;
+  }
+
+  /**
+   * Checks if the StudyUtils.setup method has been called
+   * @param {string} name - the name of a StudyUtils method
+   * @returns {void}
+   */
+  throwIfNotSetup(name = "unknown") {
+    if (!this._isSetup)
+      throw new Error(
+        name + ": this method can't be used until `setup` is called",
+      );
+  }
+
+  /**
+   * Validates the studySetup object passed in from the addon.
+   * @param {Object} studySetup - the studySetup object, see schema.studySetup.json
+   * @returns {StudyUtils} - the StudyUtils class instance
+   */
+  setup(studySetup) {
+    log = createLog("shield-study-utils", studyUtilsLoggingLevel);
+    log.debug("setting up!");
+    jsonschema.validateOrThrow(studySetup, schemas.studySetup);
+    this.studySetup = studySetup;
+    this._isSetup = true;
+    return this;
+  }
+
+  /**
+   * Resets the state of the study. Suggested use is for testing.
+   * @returns {void}
+   */
+  reset() {
+    this.studySetup = {};
+    delete this._variation;
+    this._isSetup = false;
+  }
+
+  /**
+   * @async
+   * Opens a new tab that loads a page with the specified URL.
+   * @param {string} url - the url of a page
+   * @param {Object} params - optional, see
+   * https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XUL/Method/addTab
+   * @returns {void}
+   */
+  async openTab(url, params = {}) {
+    this.throwIfNotSetup("openTab");
+    log.debug(url, params);
+    log.debug("opening this formatted tab", url, params);
+    if (!Services.wm.getMostRecentWindow("navigator:browser").gBrowser) {
+      /*
+      * Automated tests run faster than Firefox opens windows.
+      * TODO: Find less gross way to do this
+      * Wait for the window to be opened
+      */
+      await new Promise(resolve => setTimeout(resolve, 30000));
+    }
+    Services.wm
+      .getMostRecentWindow("navigator:browser")
+      .gBrowser.addTab(url, params);
+  }
+
+  /**
+   * @async
+   * Gets the telemetry client ID for the user.
+   * @returns {string} - the telemetry client ID
+   */
+  async getTelemetryId() {
+    const id = TelemetryController.clientID;
+    /* istanbul ignore next */
+    if (id === undefined) {
+      return await CID.ClientIDImpl._doLoadClientID();
+    }
+    return id;
+  }
+
+  /**
+   * Sets the variation for the StudyUtils instance.
+   * @param {Object} variation - the study variation for this user
+   * @returns {StudyUtils} - the StudyUtils class instance
+   */
+  setVariation(variation) {
+    this.throwIfNotSetup("setVariation");
+    this._variation = variation;
+    return this;
+  }
+
+  /**
+   * Gets the variation for the StudyUtils instance.
+   * @returns {Object} - the study variation for this user
+   */
+  getVariation() {
+    this.throwIfNotSetup("getvariation");
+    return this._variation;
+  }
+
+  /**
+   * @async
+   * Deterministically selects and returns the study variation for the user.
+   * @param {Object[]} weightedVariations - see schema.weightedVariations.json
+   * @param {Number} fraction - a number (0 <= fraction < 1); can be set explicitly for testing
+   * @returns {Object} - the study variation for this user
+   */
+  async deterministicVariation(weightedVariations, fraction = null) {
+    console.log("deterministicVariation", arguments);
+    // this is the standard arm choosing method
+    if (fraction === null) {
+      // hash the studyName and telemetryId to get the same branch every time.
+      this.throwIfNotSetup("deterministicVariation needs studyName");
+      const clientId = await this.getTelemetryId();
+      const studyName = this.studySetup.study.studyName;
+      fraction = await this.sampling.hashFraction(studyName + clientId, 12);
+    }
+    return this.sampling.chooseWeighted(weightedVariations, fraction);
+  }
+
+  /**
+   * Gets the Shield recipe client ID.
+   * @returns {string} - the Shield recipe client ID.
+   */
+  getShieldId() {
+    const key = "extensions.shield-recipe-client.user_id";
+    return Services.prefs.getCharPref(key, "");
+  }
+
+  /**
+   * Packages information about the study into an object.
+   * @returns {Object} - study information, see schema.studySetup.json
+   */
+  info() {
+    log.debug("getting info");
+    this.throwIfNotSetup("info");
+    return {
+      studyName: this.studySetup.study.studyName,
+      addon: this.studySetup.addon,
+      variation: this.getVariation(),
+      shieldId: this.getShieldId(),
+    };
+  }
+
+  /**
+   * Get the telemetry configuration for the study.
+   * @returns {Object} - the telemetry cofiguration, see schema.studySetup.json
+   */
+  // TODO glind, maybe this is getter / setter?
+  get telemetryConfig() {
+    this.throwIfNotSetup("telemetryConfig");
+    return this.studySetup.study.telemetry;
+  }
+
+  /**
+   * Sends an 'enter' telemetry ping for the study; should be called on addon
+   * startup for the reason ADDON_INSTALL. For more on study states like 'enter'
+   * see ABOUT.md at github.com/mozilla/shield-studies-addon-template
+   * @returns {void}
+   */
+  firstSeen() {
+    log.debug(`firstSeen`);
+    this.throwIfNotSetup("firstSeen uses telemetry.");
+    this._telemetry({ study_state: "enter" }, "shield-study");
+  }
+
+  /**
+   * Marks the study's telemetry pings as being part of this experimental
+   * cohort in a way that downstream data pipeline tools
+   * (like ExperimentsViewer) can use it.
+   * @returns {void}
+   */
+  setActive() {
+    this.throwIfNotSetup("setActive uses telemetry.");
+    const info = this.info();
+    log.debug(
+      "marking TelemetryEnvironment",
+      info.studyName,
+      info.variation.name,
+    );
+    TelemetryEnvironment.setExperimentActive(
+      info.studyName,
+      info.variation.name,
+    );
+  }
+
+  /**
+   * Removes the study from the active list of telemetry experiments
+   * @returns {void}
+   */
+  unsetActive() {
+    this.throwIfNotSetup("unsetActive uses telemetry.");
+    const info = this.info();
+    log.debug(
+      "unmarking TelemetryEnvironment",
+      info.studyName,
+      info.variation.name,
+    );
+    TelemetryEnvironment.setExperimentInactive(info.studyName);
+  }
+
+  /**
+   * Uninstalls the shield study addon, given its addon id.
+   * @param {string} id - the addon id
+   * @returns {void}
+   */
+  uninstall(id) {
+    if (!id) id = this.info().addon.id;
+    if (!id) {
+      this.throwIfNotSetup("uninstall needs addon.id as arg or from setup.");
+    }
+    log.debug(`about to uninstall ${id}`);
+    AddonManager.getAddonByID(id, addon => addon.uninstall());
+  }
+
+  /**
+   * @async
+   * Adds the study to the active list of telemetry experiments and sends the
+   * "installed" telemetry ping if applicable
+   * @param {string} reason - The reason the addon has started up
+   * @returns {void}
+   */
+  async startup({ reason }) {
+    this.throwIfNotSetup("startup");
+    log.debug(`startup ${reason}`);
+    this.setActive();
+    if (reason === REASONS.ADDON_INSTALL) {
+      this._telemetry({ study_state: "installed" }, "shield-study");
+    }
+  }
+
+  /**
+   * @async
+   * Ends the study:
+   *  - Removes the study from the active list of telemetry experiments
+   *  - Opens a new tab at a specified URL, if present (e.g. for a survey)
+   *  - Sends a telemetry ping about the nature of the ending
+   *    (positive, neutral, negative)
+   *  - Sends an exit telemetry ping
+   * @param {Object} param - A details object describing why the study is ending
+   * @param {string} param.reason - The reason the study is ending, see
+   * schema.studySetup.json
+   * @param {string} param.fullname -  optional, the full name of the study
+   * state, see schema.studySetup.json
+   * @returns {void}
+   */
+  async endStudy({ reason, fullname }) {
+    this.throwIfNotSetup("endStudy");
+    if (this._isEnding) {
+      log.debug("endStudy, already ending!");
+      return;
+    }
+    this._isEnding = true;
+    log.debug(`endStudy ${reason}`);
+    this.unsetActive();
+    // TODO glind, think about reason vs fullname
+    // TODO glind, think about race conditions for endings, ensure only one exit
+    /*
+    * Check if the study ending shows the user a page in a new tab
+    * (ex: survey, explanation, etc.)
+    */
+    const ending = this.studySetup.study.endings[reason];
+    if (ending) {
+      // baseUrl: needs to be appended with query arguments before use,
+      // exactUrl: used as is
+      const { baseUrl, exactUrl } = ending;
+      if (exactUrl) {
+        this.openTab(exactUrl);
+      } else if (baseUrl) {
+        const qa = await this.endingQueryArgs();
+        qa.reason = reason;
+        qa.fullreason = fullname;
+        const fullUrl = mergeQueryArgs(baseUrl, qa);
+        log.debug(baseUrl, fullUrl);
+        this.openTab(fullUrl);
+      }
+    }
+    switch (reason) {
+      case "ineligible":
+      case "expired":
+      case "user-disable":
+      case "ended-positive":
+      case "ended-neutral":
+      case "ended-negative":
+        this._telemetry({ study_state: reason, fullname }, "shield-study");
+        break;
+      default:
+        this._telemetry(
+          {
+            study_state: "ended-neutral",
+            study_state_fullname: reason,
+          },
+          "shield-study",
+        );
+      // unless we know better TODO grl
+    }
+    // these are all exits
+    this._telemetry({ study_state: "exit" }, "shield-study");
+    this.uninstall(); // TODO glind. should be controllable by arg?
+  }
+
+  /**
+   * @async
+   * Builds an object whose properties are query arguments that can be
+   * appended to a study ending url
+   * @returns {Object} - the query arguments for the study
+   */
+  async endingQueryArgs() {
+    // TODO glind, make this back breaking!
+    this.throwIfNotSetup("endingQueryArgs");
+    const info = this.info();
+    const who = await this.getTelemetryId();
+    const queryArgs = {
+      shield: PACKET_VERSION,
+      study: info.studyName,
+      variation: info.variation.name,
+      updateChannel: Services.appinfo.defaultUpdateChannel,
+      fxVersion: Services.appinfo.version,
+      addon: info.addon.version, // addon version
+      who, // telemetry clientId
+    };
+    queryArgs.testing = Number(!this.telemetryConfig.removeTestingFlag);
+    return queryArgs;
+  }
+
+  /**
+   * @async
+   * Validates and submits telemetry pings from StudyUtils.
+   * @param {Object} data - the data to send as part of the telemetry packet
+   * @param {string} bucket - the type of telemetry packet to be sent
+   * @returns {Promise|boolean} - A promise that resolves with the ping id
+   * once the ping is stored or sent, or false if
+   *   - there is a validation error,
+   *   - the packet is of type "shield-study-error"
+   *   - the study's telemetryConfig.send is set to false
+   */
+  async _telemetry(data, bucket = "shield-study-addon") {
+    log.debug(`telemetry in:  ${bucket} ${JSON.stringify(data)}`);
+    this.throwIfNotSetup("_telemetry");
+    const info = this.info();
+    const payload = {
+      version: PACKET_VERSION,
+      study_name: info.studyName,
+      branch: info.variation.name,
+      addon_version: info.addon.version,
+      shield_version: UTILS_VERSION,
+      type: bucket,
+      data,
+      testing: !this.telemetryConfig.removeTestingFlag,
+    };
+
+    let validation;
+    /* istanbul ignore next */
+    try {
+      validation = jsonschema.validate(payload, schemas[bucket]);
+    } catch (err) {
+      // Catch failures of unknown origin (could be library, addon, system...)
+      // if validation broke, GIVE UP.
+      log.error(err);
+      return false;
+    }
+    /*
+    * Handle validation errors by sending a "shield-study-error"
+    * telemetry ping with the error report.
+    * If the invalid payload is itself of type "shield-study-error",
+    * throw an error (to avoid a possible infinite loop).
+    */
+    if (validation.errors.length) {
+      const errorReport = {
+        error_id: "jsonschema-validation",
+        error_source: "addon",
+        severity: "fatal",
+        message: JSON.stringify(validation.errors),
+      };
+      if (bucket === "shield-study-error") {
+        // log: if it's a warn or error, it breaks jpm test
+        log.warn("cannot validate shield-study-error", data, bucket);
+        return false; // just die, maybe should have a super escape hatch?
+      }
+      return this.telemetryError(errorReport);
+    }
+    // emit(TelemetryWatcher, 'telemetry', [bucket, payload]);
+    log.debug(`telemetry: ${JSON.stringify(payload)}`);
+    // FIXME marcrowo: addClientId makes the ping not appear in test?
+    // seems like a problem with Telemetry, not the shield-study-utils library
+    const telOptions = { addClientId: true, addEnvironment: true };
+    if (!this.telemetryConfig.send) {
+      log.debug("NOT sending.  `telemetryConfig.send` is false");
+      return false;
+    }
+    return TelemetryController.submitExternalPing(bucket, payload, telOptions);
+  }
+
+  /**
+   * @async
+   * Validates and submits telemetry pings from the addon; mostly from
+   * webExtension messages.
+   * @param {Object} data - the data to send as part of the telemetry packet
+   * @returns {Promise|boolean} - see StudyUtils._telemetry
+   */
+  async telemetry(data) {
+    log.debug(`telemetry ${JSON.stringify(data)}`);
+    const toSubmit = {
+      attributes: data,
+    };
+    // lets check early, and respond with something useful?
+    return this._telemetry(toSubmit, "shield-study-addon");
+  }
+
+  /**
+   * Submits error report telemetry pings.
+   * @param {Object} errorReport - the error report, see StudyUtils._telemetry
+   * @returns {Promise|boolean} - see StudyUtils._telemetry
+   */
+  telemetryError(errorReport) {
+    return this._telemetry(errorReport, "shield-study-error");
+  }
+
+  /**
+   * Sets the logging level. This is can be called from the addon, even
+   * after the log has been created.
+   * @param {string} descriptor - the Log level (e.g. "trace", "error", ...)
+   * @returns {void}
+   */
+  setLoggingLevel(descriptor) {
+    log.level = Log.Level[descriptor];
+  }
+}
+
+/**
+ * Creates a log for debugging.
+ * Note: Log.jsm is used over Console.log/warn/error because:
+ *   - Console has limited log levels
+ *   - Console is not pref-controllable. Log can be turned on and off using
+ *     studySetup.log (see ./addon/Config.jsm in
+ *     github.com/mozilla/shield-study-addon-template)
+ *   - Console can create linting errors and warnings.
+ * @param {string} name - the name of the Logger instance
+ * @param {string} levelWord - the Log level (e.g. "trace", "error", ...)
+ * @returns {Object} - the Logger instance, see gre/modules/Log.jsm
+ */
+function createLog(name, levelWord) {
+  Cu.import("resource://gre/modules/Log.jsm");
+  const L = Log.repository.getLogger(name);
+  L.addAppender(new Log.ConsoleAppender(new Log.BasicFormatter()));
+  // should be a config / pref
+  L.level = Log.Level[levelWord] || Log.Level.Debug;
+  L.debug("log made", name, levelWord, Log.Level[levelWord]);
+  return L;
+}
+
+// addon state change reasons
+const REASONS = {
+  APP_STARTUP: 1, // The application is starting up.
+  APP_SHUTDOWN: 2, // The application is shutting down.
+  ADDON_ENABLE: 3, // The add-on is being enabled.
+  ADDON_DISABLE: 4, // The add-on is being disabled. (Also sent at uninstall)
+  ADDON_INSTALL: 5, // The add-on is being installed.
+  ADDON_UNINSTALL: 6, // The add-on is being uninstalled.
+  ADDON_UPGRADE: 7, // The add-on is being upgraded.
+  ADDON_DOWNGRADE: 8, // The add-on is being downgraded.
+};
+for (const r in REASONS) {
+  REASONS[REASONS[r]] = r;
+}
+
+// Actually create the singleton.
+const studyUtils = new StudyUtils();
+
+// to make this work with webpack!
+this.EXPORTED_SYMBOLS = EXPORTED_SYMBOLS;
+this.studyUtils = studyUtils;
diff --git a/webExtensionApis/study/src/studyUtilsBootstrap.js b/webExtensionApis/study/src/studyUtilsBootstrap.js
new file mode 100644
index 0000000..ff419f6
--- /dev/null
+++ b/webExtensionApis/study/src/studyUtilsBootstrap.js
@@ -0,0 +1,146 @@
+"use strict";
+
+const EXPORTED_SYMBOLS = ["Bootstrap"];
+
+const { utils: Cu } = Components;
+Cu.import("resource://gre/modules/Services.jsm");
+
+this.Bootstrap = function(studySetup, studyUtils) {
+  return {
+    /**
+     * Use console as our logger until there is a log() method in studyUtils that we can rely on
+     */
+    log: console,
+
+    /**
+     *
+     * @param manifest
+     * @param reason
+     * @returns {Promise<void>}
+     */
+    async configure(extension) {
+      const { manifest } = extension;
+
+      const addonId = manifest.applications.gecko.id;
+      const addonVersion = manifest.version;
+      this.initStudyUtils(addonId, addonVersion);
+
+      // choose and set variation
+      await this.selectVariation();
+    },
+
+    async startup(extension) {
+      const { startupReason } = extension;
+
+      this.log.debug("startup", startupReason);
+
+      // Check if the user is eligible to run this study using the |isEligible|
+      // function when the study is initialized
+      if (
+        startupReason === "ADDON_INSTALL" ||
+        startupReason === "ADDON_UPGRADE"
+      ) {
+        //  telemetry "enter" ONCE
+        studyUtils.firstSeen();
+        if (!studySetup.eligible) {
+          this.log.debug("User is ineligible, ending study.");
+          // 1. uses studySetup.endings.ineligible.url if any,
+          // 2. sends UT for "ineligible"
+          // 3. then uninstalls addon
+          await studyUtils.endStudy({ reason: "ineligible" });
+          return;
+        }
+      }
+
+      if (studySetup.expired) {
+        await studyUtils.endStudy({ reason: "expired" });
+        return;
+      }
+
+      /*
+      * Adds the study to the active list of telemetry experiments,
+      * and sends the "installed" telemetry ping if applicable
+      */
+      await studyUtils.startup({ startupReason });
+
+      // log what the study variation and other info is.
+      this.log.debug(`info ${JSON.stringify(studyUtils.info())}`);
+    },
+
+    initStudyUtils(id, version) {
+      // validate study config
+      studySetup.addon = { id, version };
+      studyUtils.setup(studySetup);
+      // TODO bdanforth: patch studyUtils to setLoggingLevel as part of setup method
+      //studyUtils.setLoggingLevel(...);
+    },
+
+    // choose the variation for this particular user, then set it.
+    async selectVariation() {
+      const variation =
+        this.getVariationFromPref(studySetup.weightedVariations) ||
+        (await studyUtils.deterministicVariation(
+          studySetup.weightedVariations,
+        ));
+      studyUtils.setVariation(variation);
+      this.log.debug(`studyUtils has studySetup and variation.name: ${
+        variation.name
+      }.
+      Ready to send telemetry`);
+      return variation;
+    },
+
+    // helper to let Dev or QA set the variation name
+    getVariationFromPref(weightedVariations) {
+      const name = Services.prefs.getCharPref(
+        studySetup.variationOverridePreference,
+        "",
+      );
+      if (name !== "") {
+        const variation = weightedVariations.filter(x => x.name === name)[0];
+        if (!variation) {
+          throw new Error(`about:config => ${
+            studySetup.variationOverridePreference
+          } set to ${name},
+          but no variation with that name exists.`);
+        }
+        return variation;
+      }
+      return name;
+    },
+
+    /**
+     * Shutdown needs to distinguish between USER-DISABLE and other
+     * times that `endStudy` is called.
+     *
+     * studyUtils._isEnding means this is a '2nd shutdown'.
+     */
+    async shutdown(addonData, reason) {
+      this.log.debug("shutdown", studyUtils.REASONS[reason] || reason);
+
+      const isUninstall =
+        reason === studyUtils.REASONS.ADDON_UNINSTALL ||
+        reason === studyUtils.REASONS.ADDON_DISABLE;
+      if (isUninstall) {
+        this.log.debug("uninstall or disable");
+      }
+
+      if (isUninstall && !studyUtils._isEnding) {
+        // we are the first 'uninstall' requestor => must be user action.
+        this.log.debug("probably: user requested shutdown");
+        studyUtils.endStudy({ reason: "user-disable" });
+      }
+
+      // normal shutdown, or 2nd uninstall request
+    },
+
+    uninstall(addonData, reason) {
+      this.log.debug("uninstall", reason);
+    },
+
+    install(addonData, reason) {
+      this.log.debug("install", reason);
+      // handle ADDON_UPGRADE (if needful) here
+    },
+  };
+};
diff --git a/webExtensionApis/study/webpack.config.js b/webExtensionApis/study/webpack.config.js
new file mode 100644
index 0000000..5c6ea0e
--- /dev/null
+++ b/webExtensionApis/study/webpack.config.js
@@ -0,0 +1,11 @@
+/* eslint-env node */
+const path = require("path");
+
+module.exports = {
+  entry: "./src/index.js",
+  output: {
+    path: path.resolve(__dirname),
+    filename: "api.js",
+    libraryTarget: "this", // Possible value - amd, commonjs, commonjs2, commonjs-module, this, var
+  },
+};
diff --git a/webpack.config.js b/webpack.config.js
deleted file mode 100644
index c888164..0000000
--- a/webpack.config.js
+++ /dev/null
@@ -1,11 +0,0 @@
-var path = require('path');
-const webpack = require('webpack'); //to access built-in plugins
-
-module.exports = {
-  entry: './src/StudyUtils.in.jsm',
-  output: {
-      path: path.resolve(__dirname, 'dist'),
-      filename: 'StudyUtils.jsm',
-      libraryTarget: 'this' // Possible value - amd, commonjs, commonjs2, commonjs-module, this, var
-  }
-};