initial code commit

.gitignore

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+/web-ext-artifacts
+/.phpunit.cache
+/node_modules
+npm-debug.log
+yarn-error.log
+/.idea
+/.vscode
+.DS_Store

README.md

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+## Video Ad Monitor
+
+Firefox browser extension

background.js

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+"use strict";
+
+let currentState = false;
+
+/**
+ * @param {boolean} state
+ * @return {Promise}
+ */
+function setTabState(state) {
+    return browser.tabs.query({
+        url: 'https://www.youtube.com/watch?v=*'
+    })
+    .then((tabs) => {
+        tabs.forEach((t) => {
+            browser.tabs.sendMessage(t.id, {
+                tabID: t.id,
+                active: t.active,
+                state
+            })
+            .catch((err) => {
+                throw err;
+            });
+        });
+
+        return true;
+    })
+    .catch((err) => {
+        console.error(err);
+
+        return false;
+    });
+}
+
+async function buttonClick() {
+    currentState = !currentState;
+
+    let result = await setTabState(currentState);
+
+    if (result === false) { return; }
+
+    const icon = (currentState === true) ? 'on.png' : 'off.png';
+
+    result = browser.browserAction.setIcon({
+        path: {
+            48: icon
+        }
+    })
+    .then(() => {
+        browser.browserAction.setTitle({
+            title: currentState ? 'on' : 'off'
+        });
+    })
+    .catch((err) => {
+        console.error(err);
+    });
+}
+
+browser.browserAction.onClicked.addListener(buttonClick);
+
+browser.tabs.onUpdated.addListener((tabID, changeInfo, tab) => {
+    if (currentState === true && changeInfo.status === 'complete') {
+        setTimeout(() => {
+            setTabState(true);
+        }, 500);
+    }
+}, {
+    urls: ['*://www.youtube.com/watch?v=*'],
+    properties: ['status', 'url']
+});
+
+browser.runtime.onMessage.addListener((observer) => {
+    console.log(observer);
+});

manifest.json

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+{
+  "manifest_version": 2,
+  "name": "Video Ad Monitor",
+  "version": "2.0",
+  "description": "Mutes the sound during non-skippable ads, closes banners, and clicks the skip now button when present.",
+  "icons": {
+    "48": "off.png",
+    "48": "on.png"
+  },
+  "browser_action": {
+    "default_icon": "off.png",
+    "default_title": "off"
+  },
+  "permissions": [
+    "tabs"
+  ],
+  "incognito": "spanning",
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "content_scripts": [
+    {
+      "matches": ["*://www.youtube.com/*"],
+      "js": ["video.js"]
+    }
+  ]
+}