diff --git a/distribution/manifest_v2.json b/distribution/manifest_v2.json
index a53f296..8f6cda9 100644
--- a/distribution/manifest_v2.json
+++ b/distribution/manifest_v2.json
@@ -10,12 +10,17 @@
     "default_popup": "popup/settings.html"
   },
   "background": {
-    "scripts": ["dependencies/jquery.min.js", "lib/background.bundle.js"]
+    "scripts": [
+      "dependencies/jquery.min.js",
+      "lib/background.bundle.js"
+    ]
   },
   "content_scripts": [
     {
       "run_at": "document_end",
-      "matches": ["<all_urls>"],
+      "matches": [
+        "<all_urls>"
+      ],
       "js": [
         "dependencies/jquery.min.js",
         "lib/main.bundle.js",
@@ -28,7 +33,10 @@
     "48": "icons/auto-capitalise-sentence.png",
     "128": "icons/auto-capitalise-sentence.png"
   },
-  "permissions": ["storage", "tabs"],
+  "permissions": [
+    "storage",
+    "tabs"
+  ],
   "browser_specific_settings": {
     "gecko": {
       "id": "{680e06ed-65ed-4e11-a9c0-0e6f80b9a347}"
diff --git a/src/background.js b/src/background.js
index 5176a8a..ad2e3af 100644
--- a/src/background.js
+++ b/src/background.js
@@ -12,7 +12,7 @@ import {
 } from './plugin-constants';
 import browser from 'webextension-polyfill';
 
-browser.storage.sync.set({
+browser.storage.local.set({
   [constantsKeyVal]: constantsKeyValuePairs,
   [namesKeyVal]: namesKeyValuePairs,
   [acronymsKeyVal]: acronymsKeyValuePairs,
diff --git a/src/content.js b/src/content.js
index 2f9b790..0cd3262 100644
--- a/src/content.js
+++ b/src/content.js
@@ -19,7 +19,7 @@ import {
 const errorMsg = 'breaking loop';
 let sitesToExclude = ['aws.amazon.com', 'whatsapp.com', 'messenger.com'];
 
-browser.storage.sync
+browser.storage.local
   .get([
     sitesToIgnore,
     shouldCapitaliseI,
diff --git a/src/settings.js b/src/settings.js
index b674f6f..0e2dafe 100644
--- a/src/settings.js
+++ b/src/settings.js
@@ -48,7 +48,7 @@ $(document).on(`click.${pluginNamespace}`, '#ignoreSiteButton', function () {
     var sites = getExcludedSites();
     sites.push(hostname);
 
-    browser.storage.sync.set({
+    browser.storage.local.set({
       sitesToIgnore: sites,
     });
 
@@ -61,7 +61,7 @@ $(document).on(`click.${pluginNamespace}`, '#ignoreSiteButton', function () {
 $(document).on(`click.${pluginNamespace}`, '#submitButton', function () {
   var sites = getExcludedSites();
 
-  browser.storage.sync.set({
+  browser.storage.local.set({
     sitesToIgnore: sites,
   });
 
@@ -75,7 +75,7 @@ $(document).on(
   function () {
     var excludedWords = getExcludedWords();
 
-    browser.storage.sync.set({
+    browser.storage.local.set({
       wordsToExclude: excludedWords,
     });
 
@@ -90,7 +90,7 @@ $(document).on(
   function () {
     var includedWords = getIncludedWords();
 
-    browser.storage.sync.set({
+    browser.storage.local.set({
       wordsToInclude: includedWords,
     });
 
@@ -105,7 +105,7 @@ loadFlagValuesFromBrowserStorage(shouldCapitaliseAcronyms);
 loadFlagValuesFromBrowserStorage(shouldCapitaliseLocations);
 
 function loadFlagValuesFromBrowserStorage(flagName) {
-  browser.storage.sync.get(flagName).then((items) => {
+  browser.storage.local.get(flagName).then((items) => {
     const flagValue = items[flagName];
 
     if (flagValue === true || flagValue === undefined) {
@@ -135,7 +135,7 @@ function setupCheckboxChangeEventHandlers(flagName) {
 }
 
 function setShouldCapitaliseVariable(variableName, value) {
-  browser.storage.sync.set({
+  browser.storage.local.set({
     [variableName]: value,
   });
 }