From 524f263777c7d6c258b3412fe00a4794f313b61c Mon Sep 17 00:00:00 2001
From: Andreea Pavel <apavel@mozilla.com>
Date: Thu, 26 Apr 2018 10:45:11 +0300
Subject: [PATCH] Backed out changeset fb836a045f20 (bug 1438375) for browser
 chrome failres at
 browser/components/preferences/in-content/tests/browser_extension_controlled.js

---
 browser/components/preferences/connection.xul |   7 +-
 .../in-content/extensionControlled.js         | 118 ++++++-----------
 .../components/preferences/in-content/home.js |   6 +-
 .../components/preferences/in-content/main.js |  16 ++-
 .../tests/browser_extension_controlled.js     |  86 +++++--------
 .../en-US/browser/preferences/preferences.ftl |  43 -------
 .../preferences/preferences.properties        |  38 ++++++
 ...438375_preferences_extension_controlled.py | 120 ------------------
 8 files changed, 129 insertions(+), 305 deletions(-)
 delete mode 100644 python/l10n/fluent_migrations/bug_1438375_preferences_extension_controlled.py

diff --git a/browser/components/preferences/connection.xul b/browser/components/preferences/connection.xul
index 7b9c4bc97bc4..d41e25d44266 100644
--- a/browser/components/preferences/connection.xul
+++ b/browser/components/preferences/connection.xul
@@ -20,10 +20,6 @@
         ondialoghelp="openPrefsHelp()">
 
   <link rel="localization" href="browser/preferences/connection.ftl"/>
-
-  <!-- Used for extension-controlled lockdown message -->
-  <link rel="localization" href="browser/preferences/preferences.ftl"/>
-  <link rel="localization" href="branding/brand.ftl"/>
   <script type="application/javascript" src="chrome://global/content/l10n.js"></script>
 
   <script type="application/javascript" src="chrome://browser/content/utilityOverlay.js"/>
@@ -35,6 +31,9 @@
   </keyset>
 
   <vbox id="ConnectionsDialogPane" class="prefpane largeDialogContainer">
+
+    <stringbundle id="bundlePreferences" src="chrome://browser/locale/preferences/preferences.properties"/>
+    <stringbundle id="bundleBrand" src="chrome://branding/locale/brand.properties"/>
     <script type="application/javascript" src="chrome://browser/content/preferences/connection.js"/>
 
     <hbox id="proxyExtensionContent" align="top" hidden="true">
diff --git a/browser/components/preferences/in-content/extensionControlled.js b/browser/components/preferences/in-content/extensionControlled.js
index a62ba8d4730c..9cb07afbfca3 100644
--- a/browser/components/preferences/in-content/extensionControlled.js
+++ b/browser/components/preferences/in-content/extensionControlled.js
@@ -57,14 +57,15 @@ let extensionControlledContentIds = {
   }
 };
 
-const extensionControlledL10nKeys = {
-  "homepage_override": "homepage-override",
-  "newTabURL": "new-tab-url",
-  "defaultSearch": "default-search",
-  "privacy.containers": "privacy-containers",
-  "websites.trackingProtectionMode": "websites-tracking-protection-mode",
-  "proxy.settings": "proxy-config",
-};
+function getExtensionControlledArgs(settingName) {
+  switch (settingName) {
+    case "proxyConfig":
+      return [document.getElementById("bundleBrand").getString("brandShortName$
+    default:
+      return [];
+  }
+}
+
 
 let extensionControlledIds = {};
 
@@ -96,7 +97,7 @@ async function getControllingExtension(type, settingName) {
   return addon;
 }
 
-async function handleControllingExtension(type, settingName) {
+async function handleControllingExtension(type, settingName, stringId) {
   let addon = await getControllingExtension(type, settingName);
 
   // Sometimes the ExtensionSettingsStore gets in a bad state where it thinks
@@ -106,7 +107,7 @@ async function handleControllingExtension(type, settingName) {
   // See https://bugzilla.mozilla.org/show_bug.cgi?id=1411046 for an example.
   if (addon) {
     extensionControlledIds[settingName] = addon.id;
-    showControllingExtension(settingName, addon);
+    showControllingExtension(settingName, addon, stringId);
   } else {
     let elements = getControllingExtensionEls(settingName);
     if (extensionControlledIds[settingName]
@@ -122,58 +123,35 @@ async function handleControllingExtension(type, settingName) {
   return !!addon;
 }
 
-function settingNameToL10nID(settingName) {
-  if (!extensionControlledL10nKeys.hasOwnProperty(settingName)) {
-    throw new Error(`Unknown extension controlled setting name: ${settingName}`);
-  }
-  return `extension-controlled-${extensionControlledL10nKeys[settingName]}`;
-}
-
-
-/**
- * Set the localization data for the description of the controlling extension.
- *
- * @param elem {Element}
- *        <description> element to be annotated
- * @param addon {Object?}
- *        Addon object with meta information about the addon (or null)
- * @param settingName {String}
- *        If `addon` is set this handled the name of the setting that will be used
- *        to fetch the l10n id for the given message.
- *        If `addon` is set to null, this will be the full l10n-id assigned to the
- *        element.
- */
-function setControllingExtensionDescription(elem, addon, settingName) {
-  // Remove the old content from the description.
-  while (elem.firstChild) {
-    elem.firstChild.remove();
-  }
-
-  if (addon === null) {
-    document.l10n.setAttributes(elem, settingName);
-    return;
-  }
-
-  let image = document.createElementNS("http://www.w3.org/1999/xhtml", "img");
+function getControllingExtensionFragment(stringId, addon, ...extraArgs) {
+  let msg = document.getElementById("bundlePreferences").getString(stringId);
+  let image = document.createElement("image");
   const defaultIcon = "chrome://mozapps/skin/extensions/extensionGeneric.svg";
   image.setAttribute("src", addon.iconURL || defaultIcon);
-  image.setAttribute("data-l10n-name", "icon");
   image.classList.add("extension-controlled-icon");
-  elem.appendChild(image);
-  const l10nId = settingNameToL10nID(settingName);
-  document.l10n.setAttributes(elem, l10nId, {
-    name: addon.name
-  });
+  let addonBit = document.createDocumentFragment();
+  addonBit.appendChild(image);
+  addonBit.appendChild(document.createTextNode(" " + addon.name));
+  return BrowserUtils.getLocalizedFragment(document, msg, addonBit, ...extraArgs);
 }
 
-async function showControllingExtension(settingName, addon) {
+async function showControllingExtension(
+  settingName, addon, stringId = `extensionControlled.${settingName}`) {
   // Tell the user what extension is controlling the setting.
   let elements = getControllingExtensionEls(settingName);
+  let extraArgs = getExtensionControlledArgs(settingName);
 
   elements.section.classList.remove("extension-controlled-disabled");
   let description = elements.description;
 
-  setControllingExtensionDescription(description, addon, settingName);
+  // Remove the old content from the description.
+  while (description.firstChild) {
+    description.firstChild.remove();
+  }
+
+  let fragment = getControllingExtensionFragment(
+    stringId, addon, ...extraArgs);
+  description.appendChild(fragment);
 
   if (elements.button) {
     elements.button.hidden = false;
@@ -196,39 +174,19 @@ function showEnableExtensionMessage(settingName) {
 
   elements.button.hidden = true;
   elements.section.classList.add("extension-controlled-disabled");
-
-  elements.description.textContent = "";
-
-  // We replace localization of the <description> with a DOM Fragment containing
-  // the enable-extension-enable message. That means a change from:
-  //
-  // <description data-l10n-id="..."/>
-  //
-  // to:
-  //
-  // <description>
-  //   <img/>
-  //   <label data-l10n-id="..."/>
-  // </description>
-  //
-  // We need to remove the l10n-id annotation from the <description> to prevent
-  // Fluent from overwriting the element in case of any retranslation.
-  elements.description.removeAttribute("data-l10n-id");
-
-  let icon = (url, name) => {
-    let img = document.createElementNS("http://www.w3.org/1999/xhtml", "img");
+  let icon = url => {
+    let img = document.createElement("image");
     img.src = url;
-    img.setAttribute("data-l10n-name", name);
     img.className = "extension-controlled-icon";
     return img;
   };
-  let label = document.createElement("label");
-  let addonIcon = icon("chrome://mozapps/skin/extensions/extensionGeneric-16.svg", "addons-icon");
-  let toolbarIcon = icon("chrome://browser/skin/menu.svg", "menu-icon");
-  label.appendChild(addonIcon);
-  label.appendChild(toolbarIcon);
-  document.l10n.setAttributes(label, "extension-controlled-enable");
-  elements.description.appendChild(label);
+  let addonIcon = icon("chrome://mozapps/skin/extensions/extensionGeneric-16.svg");
+  let toolbarIcon = icon("chrome://browser/skin/menu.svg");
+  let message = document.getElementById("bundlePreferences")
+                        .getString("extensionControlled.enable");
+  let frag = BrowserUtils.getLocalizedFragment(document, message, addonIcon, toolbarIcon);
+  elements.description.innerHTML = "";
+  elements.description.appendChild(frag);
   let dismissButton = document.createElement("image");
   dismissButton.setAttribute("class", "extension-controlled-icon close-icon");
   dismissButton.addEventListener("click", function dismissHandler() {
diff --git a/browser/components/preferences/in-content/home.js b/browser/components/preferences/in-content/home.js
index 31b091d428c3..1bf02e42b418 100644
--- a/browser/components/preferences/in-content/home.js
+++ b/browser/components/preferences/in-content/home.js
@@ -31,6 +31,7 @@ Preferences.addAll([
 const HOMEPAGE_OVERRIDE_KEY = "homepage_override";
 const URL_OVERRIDES_TYPE = "url_overrides";
 const NEW_TAB_KEY = "newTabURL";
+const NEW_TAB_STRING_ID = "extensionControlled.newTabURL2";
 
 let gHomePane = {
   HOME_MODE_FIREFOX_HOME: "0",
@@ -44,7 +45,7 @@ let gHomePane = {
    */
   async _handleNewTabOverrides() {
     const isControlled = await handleControllingExtension(
-      URL_OVERRIDES_TYPE, NEW_TAB_KEY);
+      URL_OVERRIDES_TYPE, NEW_TAB_KEY, NEW_TAB_STRING_ID);
     const el = document.getElementById("newTabMode");
     el.disabled = isControlled;
   },
@@ -126,7 +127,8 @@ let gHomePane = {
     if (homePref.locked) {
       return Promise.resolve(false);
     }
-    return handleControllingExtension(PREF_SETTING_TYPE, HOMEPAGE_OVERRIDE_KEY);
+    return handleControllingExtension(
+      PREF_SETTING_TYPE, HOMEPAGE_OVERRIDE_KEY, "extensionControlled.homepage_override2");
   },
 
   /**
diff --git a/browser/components/preferences/in-content/main.js b/browser/components/preferences/in-content/main.js
index 881fd0b5f009..b26e8e6c7f1d 100644
--- a/browser/components/preferences/in-content/main.js
+++ b/browser/components/preferences/in-content/main.js
@@ -932,13 +932,21 @@ var gMainPane = {
   // extension is in control or not.
   async updateProxySettingsUI() {
     let controllingExtension = await getControllingExtension(PREF_SETTING_TYPE, PROXY_KEY);
+    let fragment = controllingExtension ?
+      getControllingExtensionFragment(
+        "extensionControlled.proxyConfig", controllingExtension, this._brandShortName) :
+      BrowserUtils.getLocalizedFragment(
+        document,
+        this._prefsBundle.getString("connectionDesc.label"),
+        this._brandShortName);
     let description = document.getElementById("connectionSettingsDescription");
 
-    if (controllingExtension) {
-      setControllingExtensionDescription(description, controllingExtension, "proxyConfig");
-    } else {
-      setControllingExtensionDescription(description, null, "network-proxy-connection-description");
+    // Remove the old content from the description.
+    while (description.firstChild) {
+      description.firstChild.remove();
     }
+
+    description.appendChild(fragment);
   },
 
   async checkBrowserContainers(event) {
diff --git a/browser/components/preferences/in-content/tests/browser_extension_controlled.js b/browser/components/preferences/in-content/tests/browser_extension_controlled.js
index ab97d463d902..a31114df52f2 100644
--- a/browser/components/preferences/in-content/tests/browser_extension_controlled.js
+++ b/browser/components/preferences/in-content/tests/browser_extension_controlled.js
@@ -73,10 +73,10 @@ function waitForEnableMessage(messageId, doc) {
     { attributeFilter: ["class"], attributes: true });
 }
 
-function waitForMessageContent(messageId, l10nId, doc) {
+function waitForMessageContent(messageId, content, doc) {
   return waitForMessageChange(
     getElement(messageId, doc),
-    target => doc.l10n.getAttributes(target).id === l10nId,
+    target => target.textContent === content,
     { childList: true });
 }
 
@@ -107,12 +107,9 @@ add_task(async function testExtensionControlledHomepage() {
   // The homepage has been set by the extension, the user is notified and it isn't editable.
   let controlledLabel = controlledContent.querySelector("description");
   is(homepagePref(), extensionHomepage, "homepage is set by extension");
-  Assert.deepEqual(doc.l10n.getAttributes(controlledLabel), {
-    id: "extension-controlled-homepage-override",
-    args: {
-      name: "set_homepage",
-    }
-  }, "The user is notified that an extension is controlling the homepage");
+  // There are two spaces before "set_homepage" because it's " <image /> set_homepage".
+  is(controlledLabel.textContent, "An extension,  set_homepage, is controlling your home page.",
+     "The user is notified that an extension is controlling the homepage");
   is(controlledContent.hidden, false, "The extension controlled row is hidden");
   is(homeModeEl.disabled, true, "The homepage input is disabled");
 
@@ -122,9 +119,8 @@ add_task(async function testExtensionControlledHomepage() {
   await enableMessageShown;
 
   // The user is notified how to enable the extension.
-  is(doc.l10n.getAttributes(controlledLabel.querySelector("label")).id,
-    "extension-controlled-enable",
-    "The user is notified of how to enable the extension again");
+  is(controlledLabel.textContent, "To enable the extension go to  Add-ons in the  menu.",
+     "The user is notified of how to enable the extension again");
 
   // The user can dismiss the enable instructions.
   let hidden = waitForMessageHidden("browserHomePageExtensionContent");
@@ -313,12 +309,9 @@ add_task(async function testExtensionControlledNewTab() {
   // The new tab page has been set by the extension and the user is notified.
   let controlledLabel = controlledContent.querySelector("description");
   ok(aboutNewTabService.newTabURL.startsWith("moz-extension:"), "new tab url is set by extension");
-  Assert.deepEqual(doc.l10n.getAttributes(controlledLabel), {
-    id: "extension-controlled-new-tab-url",
-    args: {
-      name: "set_newtab",
-    }
-  }, "The user is notified that an extension is controlling the new tab page");
+  // There are two spaces before "set_newtab" because it's " <image /> set_newtab".
+  is(controlledLabel.textContent, "An extension,  set_newtab, is controlling your New Tab page.",
+     "The user is notified that an extension is controlling the new tab page");
   is(controlledContent.hidden, false, "The extension controlled row is hidden");
 
   // Disable the extension.
@@ -326,9 +319,8 @@ add_task(async function testExtensionControlledNewTab() {
 
   // Verify the user is notified how to enable the extension.
   await waitForEnableMessage(controlledContent.id);
-  is(doc.l10n.getAttributes(controlledLabel.querySelector("label")).id,
-    "extension-controlled-enable",
-    "The user is notified of how to enable the extension again");
+  is(controlledLabel.textContent, "To enable the extension go to  Add-ons in the  menu.",
+     "The user is notified of how to enable the extension again");
 
   // Verify the enable message can be dismissed.
   let hidden = waitForMessageHidden(controlledContent.id);
@@ -396,12 +388,10 @@ add_task(async function testExtensionControlledDefaultSearch() {
   let controlledLabel = controlledContent.querySelector("description");
   let extensionEngine = Services.search.currentEngine;
   ok(initialEngine != extensionEngine, "The default engine has changed.");
-  Assert.deepEqual(doc.l10n.getAttributes(controlledLabel), {
-    id: "extension-controlled-default-search",
-    args: {
-      name: "set_default_search",
-    }
-  }, "The user is notified that an extension is controlling the default search engine");
+  // There are two spaces before "set_default_search" because it's " <image /> set_default_search".
+  is(controlledLabel.textContent,
+     "An extension,  set_default_search, has set your default search engine.",
+     "The user is notified that an extension is controlling the default search engine");
   is(controlledContent.hidden, false, "The extension controlled row is shown");
 
   // Set the engine back to the initial one, ensure the message is hidden.
@@ -539,12 +529,9 @@ add_task(async function testExtensionControlledTrackingProtection() {
     is(controlledButton.hidden, !isControlled, "The disable extension button's visibility is as expected.");
     if (isControlled) {
       let controlledDesc = controlledLabel.querySelector("description");
-      Assert.deepEqual(doc.l10n.getAttributes(controlledDesc), {
-        id: "extension-controlled-websites-tracking-protection-mode",
-        args: {
-          name: "set_tp",
-        }
-      }, "The user is notified that an extension is controlling TP.");
+      // There are two spaces before "set_tp" because it's " <image /> set_tp".
+      is(controlledDesc.textContent, "An extension,  set_tp, is controlling tracking protection.",
+         "The user is notified that an extension is controlling TP.");
     }
 
     if (uiType === "new") {
@@ -574,9 +561,8 @@ add_task(async function testExtensionControlledTrackingProtection() {
 
     // The user is notified how to enable the extension.
     let controlledDesc = controlledLabel.querySelector("description");
-    is(doc.l10n.getAttributes(controlledDesc.querySelector("label")).id,
-      "extension-controlled-enable",
-      "The user is notified of how to enable the extension again");
+    is(controlledDesc.textContent, "To enable the extension go to  Add-ons in the  menu.",
+       "The user is notified of how to enable the extension again");
 
     // The user can dismiss the enable instructions.
     let hidden = waitForMessageHidden(labelId);
@@ -664,21 +650,22 @@ add_task(async function testExtensionControlledProxyConfig() {
   }
 
   function expectedConnectionSettingsMessage(doc, isControlled) {
+    let brandShortName = doc.getElementById("bundleBrand").getString("brandShortName");
     return isControlled ?
-      "extension-controlled-proxy-config" :
-      "network-proxy-connection-description";
+      `An extension,  set_proxy, is controlling how ${brandShortName} connects to the internet.` :
+      `Configure how ${brandShortName} connects to the internet.`;
   }
 
   function connectionSettingsMessagePromise(doc, isControlled) {
     return waitForMessageContent(
       CONNECTION_SETTINGS_DESC_ID,
-      expectedConnectionSettingsMessage(doc, isControlled),
-      doc
+      expectedConnectionSettingsMessage(doc, isControlled)
     );
   }
 
   function verifyState(doc, isControlled) {
     let isPanel = doc.getElementById(CONTROLLED_BUTTON_ID);
+    let brandShortName = doc.getElementById("bundleBrand").getString("brandShortName");
     is(proxyType === proxySvc.PROXYCONFIG_DIRECT, isControlled,
       "Proxy pref is set to the expected value.");
 
@@ -692,12 +679,9 @@ add_task(async function testExtensionControlledProxyConfig() {
       }
       if (isControlled) {
         let controlledDesc = controlledSection.querySelector("description");
-        Assert.deepEqual(doc.l10n.getAttributes(controlledDesc), {
-          id: "extension-controlled-proxy-config",
-          args: {
-            name: "set_proxy",
-          }
-        }, "The user is notified that an extension is controlling proxy settings.");
+        // There are two spaces before "set_proxy" because it's " <image /> set_proxy".
+        is(controlledDesc.textContent, `An extension,  set_proxy, is controlling how ${brandShortName} connects to the internet.`,
+          "The user is notified that an extension is controlling proxy settings.");
       }
       function getProxyControls() {
         let controlGroup = doc.getElementById("networkProxyType");
@@ -728,10 +712,9 @@ add_task(async function testExtensionControlledProxyConfig() {
         is(element.disabled, isControlled, `Proxy controls are ${controlState}.`);
       }
     } else {
-      let elem = doc.getElementById(CONNECTION_SETTINGS_DESC_ID);
-      is(doc.l10n.getAttributes(elem).id,
-        expectedConnectionSettingsMessage(doc, isControlled),
-        "The connection settings description is as expected.");
+      is(doc.getElementById(CONNECTION_SETTINGS_DESC_ID).textContent,
+         expectedConnectionSettingsMessage(doc, isControlled),
+         "The connection settings description is as expected.");
     }
   }
 
@@ -745,9 +728,8 @@ add_task(async function testExtensionControlledProxyConfig() {
 
     // The user is notified how to enable the extension.
     let controlledDesc = controlledSection.querySelector("description");
-    is(panelDoc.l10n.getAttributes(controlledDesc.querySelector("label")).id,
-      "extension-controlled-enable",
-      "The user is notified of how to enable the extension again");
+    is(controlledDesc.textContent, "To enable the extension go to  Add-ons in the  menu.",
+       "The user is notified of how to enable the extension again");
 
     // The user can dismiss the enable instructions.
     let hidden = waitForMessageHidden(sectionId, panelDoc);
diff --git a/browser/locales/en-US/browser/preferences/preferences.ftl b/browser/locales/en-US/browser/preferences/preferences.ftl
index d9e19c6a9dd7..48660c1d7b5d 100644
--- a/browser/locales/en-US/browser/preferences/preferences.ftl
+++ b/browser/locales/en-US/browser/preferences/preferences.ftl
@@ -76,47 +76,6 @@ should-restart-ok = Restart { -brand-short-name } now
 cancel-no-restart-button = Cancel
 restart-later = Restart Later
 
-## Extension Control Notifications
-##
-## These strings are used to inform the user
-## about changes made by extensions to browser settings.
-##
-## <img data-l10n-name="icon"/> is going to be replaced by the extension icon.
-##
-## Variables:
-##   $name (String): name of the extension
-
-# This string is shown to notify the user that their home page
-# is being controlled by an extension.
-extension-controlled-homepage-override = An extension, <img data-l10n-name="icon"/> { $name }, is controlling your home page.
-
-# This string is shown to notify the user that their new tab page
-# is being controlled by an extension.
-extension-controlled-new-tab-url = An extension, <img data-l10n-name="icon"/> { $name }, is controlling your New Tab page.
-
-# This string is shown to notify the user that the default search engine
-# is being controlled by an extension.
-extension-controlled-default-search = An extension, <img data-l10n-name="icon"/> { $name }, has set your default search engine.
-
-# This string is shown to notify the user that Container Tabs
-# are being enabled by an extension.
-extension-controlled-privacy-containers = An extension, <img data-l10n-name="icon"/> { $name }, requires Container Tabs.
-
-# This string is shown to notify the user that their tracking protection preferences
-# are being controlled by an extension.
-extension-controlled-websites-tracking-protection-mode = An extension, <img data-l10n-name="icon"/> { $name }, is controlling tracking protection.
-
-# This string is shown to notify the user that their proxy configuration preferences
-# are being controlled by an extension.
-extension-controlled-proxy-config = An extension, <img data-l10n-name="icon"/> { $name }, is controlling how { -brand-short-name } connects to the internet.
-
-# This string is shown after the user disables an extension to notify the user
-# how to enable an extension that they disabled.
-#
-# <img data-l10n-name="addons-icon"/> will be replaced with Add-ons icon
-# <img data-l10n-name="menu-icon"/> will be replaced with Menu icon
-extension-controlled-enable = To enable the extension go to <img data-l10n-name="addons-icon"/> Add-ons in the <img data-l10n-name="menu-icon"/> menu.
-
 ## Preferences UI Search Results
 
 search-results-header = Search Results
@@ -403,8 +362,6 @@ browsing-search-on-start-typing =
 
 network-proxy-title = Network Proxy
 
-network-proxy-connection-description = Configure how { -brand-short-name } connects to the internet.
-
 network-proxy-connection-learn-more = Learn More
 
 network-proxy-connection-settings =
diff --git a/browser/locales/en-US/chrome/browser/preferences/preferences.properties b/browser/locales/en-US/chrome/browser/preferences/preferences.properties
index 15f688fcd727..14023bb65dc8 100644
--- a/browser/locales/en-US/chrome/browser/preferences/preferences.properties
+++ b/browser/locales/en-US/chrome/browser/preferences/preferences.properties
@@ -168,3 +168,41 @@ spaceAlert.under5GB.okButton.label=OK, Got it
 spaceAlert.under5GB.okButton.accesskey=K
 # LOCALIZATION NOTE (spaceAlert.under5GB.message): %S = brandShortName
 spaceAlert.under5GB.message=%S is running out of disk space. Website contents may not display properly. Visit “Learn More” to optimize your disk usage for better browsing experience.
+
+# LOCALIZATION NOTE (extensionControlled.homepage_override2):
+# This string is shown to notify the user that their home page is being controlled by an extension.
+extensionControlled.homepage_override2 = An extension, %S, is controlling your home page.
+
+# LOCALIZATION NOTE (extensionControlled.newTabURL2):
+# This string is shown to notify the user that their new tab page is being controlled by an extension.
+extensionControlled.newTabURL2 = An extension, %S, is controlling your New Tab page.
+
+# LOCALIZATION NOTE (extensionControlled.defaultSearch):
+# This string is shown to notify the user that the default search engine is being controlled
+# by an extension. %S is the icon and name of the extension.
+extensionControlled.defaultSearch = An extension, %S, has set your default search engine.
+
+# LOCALIZATION NOTE (extensionControlled.privacy.containers):
+# This string is shown to notify the user that Container Tabs are being enabled by an extension
+# %S is the container addon controlling it
+extensionControlled.privacy.containers = An extension, %S, requires Container Tabs.
+
+# LOCALIZATION NOTE (extensionControlled.websites.trackingProtectionMode):
+# This string is shown to notify the user that their tracking protection preferences are being controlled by an extension.
+extensionControlled.websites.trackingProtectionMode = An extension, %S, is controlling tracking protection.
+
+# LOCALIZATION NOTE (extensionControlled.proxyConfig):
+# This string is shown to notify the user that their proxy configuration preferences are being controlled by an extension.
+# %1$S is the icon and name of the extension.
+# %2$S is the brandShortName from brand.properties (for example "Nightly")
+extensionControlled.proxyConfig = An extension, %1$S, is controlling how %2$S connects to the internet.
+
+# LOCALIZATION NOTE (extensionControlled.enable):
+# %1$S is replaced with the icon for the add-ons menu.
+# %2$S is replaced with the icon for the toolbar menu.
+# This string is shown to notify the user how to enable an extension that they disabled.
+extensionControlled.enable = To enable the extension go to %1$S Add-ons in the %2$S menu.
+
+# LOCALIZATION NOTE (connectionDesc.label):
+# %S is the brandShortName from brand.properties (for example "Nightly")
+connectionDesc.label = Configure how %S connects to the internet.
diff --git a/python/l10n/fluent_migrations/bug_1438375_preferences_extension_controlled.py b/python/l10n/fluent_migrations/bug_1438375_preferences_extension_controlled.py
deleted file mode 100644
index 8c9750e5798a..000000000000
--- a/python/l10n/fluent_migrations/bug_1438375_preferences_extension_controlled.py
+++ /dev/null
@@ -1,120 +0,0 @@
-# coding=utf8
-
-# Any copyright is dedicated to the Public Domain.
-# http://creativecommons.org/publicdomain/zero/1.0/
-
-from __future__ import absolute_import
-import fluent.syntax.ast as FTL
-from fluent.migrate.helpers import MESSAGE_REFERENCE, EXTERNAL_ARGUMENT
-from fluent.migrate import COPY, CONCAT, REPLACE
-
-
-def migrate(ctx):
-    """Bug 1438375 - Migrate Extension Controlled settings in Preferences to Fluent, part {index}."""
-
-    ctx.add_transforms(
-        'browser/browser/preferences/preferences.ftl',
-        'browser/browser/preferences/preferences.ftl',
-        [
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-homepage-override'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.homepage_override2',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-new-tab-url'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.newTabURL2',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-default-search'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.defaultSearch',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-privacy-containers'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.privacy.containers',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-websites-tracking-protection-mode'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.websites.trackingProtectionMode',
-                    {
-                        '%S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        )
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-proxy-config'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.proxyConfig',
-                    {
-                        '%1$S': CONCAT(
-                            FTL.TextElement('<img data-l10n-name="icon"/> '),
-                            EXTERNAL_ARGUMENT('name')
-                        ),
-                        '%2$S': MESSAGE_REFERENCE('-brand-short-name'),
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('extension-controlled-enable'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'extensionControlled.enable',
-                    {
-                        '%1$S': FTL.TextElement('<img data-l10n-name="addons-icon"/>'),
-                        '%2$S': FTL.TextElement('<img data-l10n-name="menu-icon"/>'),
-                    }
-                )
-            ),
-            FTL.Message(
-                id=FTL.Identifier('network-proxy-connection-description'),
-                value=REPLACE(
-                    'browser/chrome/browser/preferences/preferences.properties',
-                    'connectionDesc.label',
-                    {
-                        '%S': MESSAGE_REFERENCE('-brand-short-name'),
-                    }
-                )
-            ),
-        ]
-    )