Mass-replace global-scope let with var in Pale Moon and TychoAM

tag #155

62 files changed, 120 insertions, 119 deletions

diff --git a/application/palemoon/base/content/abouthome/aboutHome.js b/application/palemoon/base/content/abouthome/aboutHome.js
index 9e826b69e..6a970acd6 100644
--- a/application/palemoon/base/content/abouthome/aboutHome.js
+++ b/application/palemoon/base/content/abouthome/aboutHome.js
@@ -234,8 +234,8 @@ const SEARCH_ENGINES = {
 };
 
 // This global tracks if the page has been set up before, to prevent double inits
-let gInitialized = false;
-let gObserver = new MutationObserver(function (mutations) {
+var gInitialized = false;
+var gObserver = new MutationObserver(function (mutations) {
   for (let mutation of mutations) {
     if (mutation.attributeName == "searchEngineURL") {
       setupSearchEngine();
diff --git a/application/palemoon/base/content/browser-addons.js b/application/palemoon/base/content/browser-addons.js
index 7993a0c9c..f5c398f33 100644
--- a/application/palemoon/base/content/browser-addons.js
+++ b/application/palemoon/base/content/browser-addons.js
@@ -226,7 +226,7 @@ const gXPInstallObserver = {
  * - If an add-on was installed, incrementing the count, show the bar.
  * - If an add-on was uninstalled, and no more items are left, hide the bar.
  */
-let AddonsMgrListener = {
+var AddonsMgrListener = {
   get addonBar() document.getElementById("addon-bar"),
   get statusBar() document.getElementById("status-bar"),
   getAddonBarItemCount: function() {
@@ -461,7 +461,7 @@ var LightWeightThemeWebInstaller = {
 /*
  * Listen for Lightweight Theme styling changes and update the browser's theme accordingly.
  */
-let LightweightThemeListener = {
+var LightweightThemeListener = {
   _modifiedStyles: [],
 
   init: function () {
diff --git a/application/palemoon/base/content/browser-gestureSupport.js b/application/palemoon/base/content/browser-gestureSupport.js
index d88f47c79..13eb71b99 100644
--- a/application/palemoon/base/content/browser-gestureSupport.js
+++ b/application/palemoon/base/content/browser-gestureSupport.js
@@ -13,7 +13,7 @@
 // chrome-only, we must listen for the simple gesture events during
 // the capturing phase and call stopPropagation on every event.
 
-let gGestureSupport = {
+var gGestureSupport = {
   _currentRotation: 0,
   _lastRotateDelta: 0,
   _rotateMomentumThreshold: .75,
@@ -532,7 +532,7 @@ let gGestureSupport = {
 };
 
 // History Swipe Animation Support (bug 678392)
-let gHistorySwipeAnimation = {
+var gHistorySwipeAnimation = {
 
   active: false,
   isLTR: false,
diff --git a/application/palemoon/base/content/browser-places.js b/application/palemoon/base/content/browser-places.js
index cf9c28597..5c13a43f9 100644
--- a/application/palemoon/base/content/browser-places.js
+++ b/application/palemoon/base/content/browser-places.js
@@ -959,7 +959,7 @@ var PlacesMenuDNDHandler = {
  * This object handles the initialization and uninitialization of the bookmarks
  * toolbar.
  */
-let PlacesToolbarHelper = {
+var PlacesToolbarHelper = {
   _place: "place:folder=TOOLBAR",
 
   get _viewElt() {
@@ -1006,7 +1006,7 @@ let PlacesToolbarHelper = {
  * menu button.
  */
 
-let BookmarkingUI = {
+var BookmarkingUI = {
   get button() {
     if (!this._button) {
       this._button = document.getElementById("bookmarks-menu-button");
diff --git a/application/palemoon/base/content/browser-syncui.js b/application/palemoon/base/content/browser-syncui.js
index fc8c7f016..67056e221 100644
--- a/application/palemoon/base/content/browser-syncui.js
+++ b/application/palemoon/base/content/browser-syncui.js
@@ -3,7 +3,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 // gSyncUI handles updating the tools menu
-let gSyncUI = {
+var gSyncUI = {
   _obs: ["weave:service:sync:start",
          "weave:service:sync:delayed",
          "weave:service:quota:remaining",
diff --git a/application/palemoon/base/content/browser-thumbnails.js b/application/palemoon/base/content/browser-thumbnails.js
index b06dfd503..079b0ac1b 100644
--- a/application/palemoon/base/content/browser-thumbnails.js
+++ b/application/palemoon/base/content/browser-thumbnails.js
@@ -7,7 +7,7 @@
 /**
  * Keeps thumbnails of open web pages up-to-date.
  */
-let gBrowserThumbnails = {
+var gBrowserThumbnails = {
   /**
    * Pref that controls whether we can store SSL content on disk
    */
diff --git a/application/palemoon/base/content/browser-webrtcUI.js b/application/palemoon/base/content/browser-webrtcUI.js
index a6c9008ca..d59134ce5 100644
--- a/application/palemoon/base/content/browser-webrtcUI.js
+++ b/application/palemoon/base/content/browser-webrtcUI.js
@@ -3,7 +3,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-let WebrtcIndicator = {
+var WebrtcIndicator = {
   init: function () {
     let temp = {};
     Cu.import("resource:///modules/webrtcUI.jsm", temp);
diff --git a/application/palemoon/base/content/browser.js b/application/palemoon/base/content/browser.js
index b2d260101..fc2e63393 100644
--- a/application/palemoon/base/content/browser.js
+++ b/application/palemoon/base/content/browser.js
@@ -2329,7 +2329,7 @@ function BrowserOnAboutPageLoad(doc) {
 /**
  * Handle command events bubbling up from error page content
  */
-let BrowserOnClick = {
+var BrowserOnClick = {
   handleEvent: function BrowserOnClick_handleEvent(aEvent) {
     if (!aEvent.isTrusted || // Don't trust synthetic events
         aEvent.button == 2 || aEvent.target.localName != "button") {
@@ -6998,7 +6998,8 @@ function focusNextFrame(event) {
   if (element.ownerDocument == document)
     focusAndSelectUrlBar();
 }
-let BrowserChromeTest = {
+
+var BrowserChromeTest = {
   _cb: null,
   _ready: false,
   markAsReady: function () {
@@ -7016,7 +7017,7 @@ let BrowserChromeTest = {
   }
 };
 
-let ToolbarIconColor = {
+var ToolbarIconColor = {
   init: function () {
     this._initialized = true;
 
diff --git a/application/palemoon/base/content/newtab/drag.js b/application/palemoon/base/content/newtab/drag.js
index 8f0bf674e..fbd688faa 100644
--- a/application/palemoon/base/content/newtab/drag.js
+++ b/application/palemoon/base/content/newtab/drag.js
@@ -7,7 +7,7 @@
 /**
  * This singleton implements site dragging functionality.
  */
-let gDrag = {
+var gDrag = {
   /**
    * The site offset to the drag start point.
    */
diff --git a/application/palemoon/base/content/newtab/dragDataHelper.js b/application/palemoon/base/content/newtab/dragDataHelper.js
index a66e4e87e..54348ab14 100644
--- a/application/palemoon/base/content/newtab/dragDataHelper.js
+++ b/application/palemoon/base/content/newtab/dragDataHelper.js
@@ -4,7 +4,7 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 #endif
 
-let gDragDataHelper = {
+var gDragDataHelper = {
   get mimeType() {
     return "text/x-moz-url";
   },
diff --git a/application/palemoon/base/content/newtab/drop.js b/application/palemoon/base/content/newtab/drop.js
index d7bf30506..748652455 100644
--- a/application/palemoon/base/content/newtab/drop.js
+++ b/application/palemoon/base/content/newtab/drop.js
@@ -11,7 +11,7 @@ const DELAY_REARRANGE_MS = 100;
 /**
  * This singleton implements site dropping functionality.
  */
-let gDrop = {
+var gDrop = {
   /**
    * The last drop target.
    */
diff --git a/application/palemoon/base/content/newtab/dropPreview.js b/application/palemoon/base/content/newtab/dropPreview.js
index 903762345..fd7587a35 100644
--- a/application/palemoon/base/content/newtab/dropPreview.js
+++ b/application/palemoon/base/content/newtab/dropPreview.js
@@ -9,7 +9,7 @@
  * indicate the transformation that results from dropping a cell at a certain
  * position.
  */
-let gDropPreview = {
+var gDropPreview = {
   /**
    * Rearranges the sites currently contained in the grid when a site would be
    * dropped onto the given cell.
diff --git a/application/palemoon/base/content/newtab/dropTargetShim.js b/application/palemoon/base/content/newtab/dropTargetShim.js
index a85a6ccd6..046dbea1e 100644
--- a/application/palemoon/base/content/newtab/dropTargetShim.js
+++ b/application/palemoon/base/content/newtab/dropTargetShim.js
@@ -9,7 +9,7 @@
  * the default DnD target detection relies on the cursor's position. We want
  * to pick a drop target based on the dragged site's position.
  */
-let gDropTargetShim = {
+var gDropTargetShim = {
   /**
    * Cache for the position of all cells, cleaned after drag finished.
    */
diff --git a/application/palemoon/base/content/newtab/grid.js b/application/palemoon/base/content/newtab/grid.js
index 3b7dfc35f..46e0b804b 100644
--- a/application/palemoon/base/content/newtab/grid.js
+++ b/application/palemoon/base/content/newtab/grid.js
@@ -7,7 +7,7 @@
 /**
  * This singleton represents the grid that contains all sites.
  */
-let gGrid = {
+var gGrid = {
   /**
    * The DOM node of the grid.
    */
diff --git a/application/palemoon/base/content/newtab/newTab.js b/application/palemoon/base/content/newtab/newTab.js
index 6d8647ab6..bba73fd7a 100644
--- a/application/palemoon/base/content/newtab/newTab.js
+++ b/application/palemoon/base/content/newtab/newTab.js
@@ -18,7 +18,7 @@ XPCOMUtils.defineLazyModuleGetter(this, "Rect",
 XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
   "resource://gre/modules/PrivateBrowsingUtils.jsm");
 
-let {
+var {
   links: gLinks,
   allPages: gAllPages,
   linkChecker: gLinkChecker,
diff --git a/application/palemoon/base/content/newtab/page.js b/application/palemoon/base/content/newtab/page.js
index afe5bfba8..fc836a55e 100644
--- a/application/palemoon/base/content/newtab/page.js
+++ b/application/palemoon/base/content/newtab/page.js
@@ -8,7 +8,7 @@
  * This singleton represents the whole 'New Tab Page' and takes care of
  * initializing all its components.
  */
-let gPage = {
+var gPage = {
   /**
    * Initializes the page.
    */
diff --git a/application/palemoon/base/content/newtab/transformations.js b/application/palemoon/base/content/newtab/transformations.js
index 6d1554f5f..0711d7d0a 100644
--- a/application/palemoon/base/content/newtab/transformations.js
+++ b/application/palemoon/base/content/newtab/transformations.js
@@ -9,7 +9,7 @@
  * in the DOM and by showing or hiding the node. It additionally provides
  * convenience methods to work with a site's DOM node.
  */
-let gTransformation = {
+var gTransformation = {
   /**
    * Returns the width of the left and top border of a cell. We need to take it
    * into account when measuring and comparing site and cell positions.
diff --git a/application/palemoon/base/content/newtab/undo.js b/application/palemoon/base/content/newtab/undo.js
index 5f619e980..b856914d2 100644
--- a/application/palemoon/base/content/newtab/undo.js
+++ b/application/palemoon/base/content/newtab/undo.js
@@ -8,7 +8,7 @@
  * Dialog allowing to undo the removal of single site or to completely restore
  * the grid's original state.
  */
-let gUndoDialog = {
+var gUndoDialog = {
   /**
    * The undo dialog's timeout in miliseconds.
    */
diff --git a/application/palemoon/base/content/newtab/updater.js b/application/palemoon/base/content/newtab/updater.js
index 7b483e037..e6da37f87 100644
--- a/application/palemoon/base/content/newtab/updater.js
+++ b/application/palemoon/base/content/newtab/updater.js
@@ -8,7 +8,7 @@
  * This singleton provides functionality to update the current grid to a new
  * set of pinned and blocked sites. It adds, moves and removes sites.
  */
-let gUpdater = {
+var gUpdater = {
   /**
    * Updates the current grid according to its pinned and blocked sites.
    * This removes old, moves existing and creates new sites to fill gaps.
diff --git a/application/palemoon/base/content/openLocation.js b/application/palemoon/base/content/openLocation.js
index 5b731c7e8..316dfac70 100644
--- a/application/palemoon/base/content/openLocation.js
+++ b/application/palemoon/base/content/openLocation.js
@@ -7,7 +7,7 @@
 var browser;
 var dialog = {};
 var pref = null;
-let openLocationModule = {};
+var openLocationModule = {};
 try {
   pref = Components.classes["@mozilla.org/preferences-service;1"]
                    .getService(Components.interfaces.nsIPrefBranch);
@@ -16,7 +16,7 @@ try {
 }
 
 Components.utils.import("resource:///modules/openLocationLastURL.jsm", openLocationModule);
-let gOpenLocationLastURL = new openLocationModule.OpenLocationLastURL(window.opener);
+var gOpenLocationLastURL = new openLocationModule.OpenLocationLastURL(window.opener);
 
 function onLoad()
 {
diff --git a/application/palemoon/base/content/sync/aboutSyncTabs.js b/application/palemoon/base/content/sync/aboutSyncTabs.js
index 535c43e56..bc624a459 100644
--- a/application/palemoon/base/content/sync/aboutSyncTabs.js
+++ b/application/palemoon/base/content/sync/aboutSyncTabs.js
@@ -11,7 +11,7 @@ Cu.import("resource://gre/modules/PlacesUtils.jsm", this);
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 
-let RemoteTabViewer = {
+var RemoteTabViewer = {
   _tabsList: null,
 
   init: function () {
diff --git a/application/palemoon/base/content/sync/addDevice.js b/application/palemoon/base/content/sync/addDevice.js
index 556e75768..40862a791 100644
--- a/application/palemoon/base/content/sync/addDevice.js
+++ b/application/palemoon/base/content/sync/addDevice.js
@@ -15,7 +15,7 @@ const ADD_DEVICE_PAGE       = 0;
 const SYNC_KEY_PAGE         = 1;
 const DEVICE_CONNECTED_PAGE = 2;
 
-let gSyncAddDevice = {
+var gSyncAddDevice = {
 
   init: function init() {
     this.pin1.setAttribute("maxlength", PIN_PART_LENGTH);
diff --git a/application/palemoon/base/content/sync/genericChange.js b/application/palemoon/base/content/sync/genericChange.js
index 6d1ce9485..0c6dc145e 100644
--- a/application/palemoon/base/content/sync/genericChange.js
+++ b/application/palemoon/base/content/sync/genericChange.js
@@ -8,7 +8,7 @@ const Cc = Components.classes;
 Components.utils.import("resource://services-sync/main.js");
 Components.utils.import("resource://gre/modules/Services.jsm");
 
-let Change = {
+var Change = {
   _dialog: null,
   _dialogType: null,
   _status: null,
diff --git a/application/palemoon/base/content/sync/progress.js b/application/palemoon/base/content/sync/progress.js
index 2063f612a..101160fa8 100644
--- a/application/palemoon/base/content/sync/progress.js
+++ b/application/palemoon/base/content/sync/progress.js
@@ -6,8 +6,8 @@ const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://services-sync/main.js");
 
-let gProgressBar;
-let gCounter = 0;
+var gProgressBar;
+var gCounter = 0;
 
 function onLoad(event) {
   Services.obs.addObserver(onEngineSync, "weave:engine:sync:finish", false);
diff --git a/application/palemoon/base/content/sync/quota.js b/application/palemoon/base/content/sync/quota.js
index 7117a2ddf..454052754 100644
--- a/application/palemoon/base/content/sync/quota.js
+++ b/application/palemoon/base/content/sync/quota.js
@@ -10,7 +10,7 @@ const Cu = Components.utils;
 Cu.import("resource://services-sync/main.js");
 Cu.import("resource://gre/modules/DownloadUtils.jsm");
 
-let gSyncQuota = {
+var gSyncQuota = {
 
   init: function init() {
     this.bundle = document.getElementById("quotaStrings");
@@ -86,7 +86,7 @@ let gSyncQuota = {
 
 };
 
-let gUsageTreeView = {
+var gUsageTreeView = {
 
   _ignored: {keys: true,
              meta: true,
diff --git a/application/palemoon/base/content/sync/utils.js b/application/palemoon/base/content/sync/utils.js
index 0c02b5bc0..d41ecf18a 100644
--- a/application/palemoon/base/content/sync/utils.js
+++ b/application/palemoon/base/content/sync/utils.js
@@ -8,7 +8,7 @@
 const PERMISSIONS_RWUSR = 0x180;
 
 // Weave should always exist before before this file gets included.
-let gSyncUtils = {
+var gSyncUtils = {
   get bundle() {
     delete this.bundle;
     return this.bundle = Services.strings.createBundle("chrome://browser/locale/syncSetup.properties");
diff --git a/application/palemoon/components/downloads/DownloadsCommon.jsm b/application/palemoon/components/downloads/DownloadsCommon.jsm
index 0921f8400..c6614e780 100644
--- a/application/palemoon/components/downloads/DownloadsCommon.jsm
+++ b/application/palemoon/components/downloads/DownloadsCommon.jsm
@@ -104,7 +104,7 @@ const kPartialDownloadSuffix = ".part";
 
 const kPrefBranch = Services.prefs.getBranch("browser.download.");
 
-let PrefObserver = {
+var PrefObserver = {
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
                                          Ci.nsISupportsWeakReference]),
   getPref: function PO_getPref(name) {
diff --git a/application/palemoon/components/downloads/content/contentAreaDownloadsView.js b/application/palemoon/components/downloads/content/contentAreaDownloadsView.js
index 29e2e368c..fbb18ab04 100644
--- a/application/palemoon/components/downloads/content/contentAreaDownloadsView.js
+++ b/application/palemoon/components/downloads/content/contentAreaDownloadsView.js
@@ -4,7 +4,7 @@
 
 Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm");
 
-let ContentAreaDownloadsView = {
+var ContentAreaDownloadsView = {
   init: function CADV_init() {
     let view = new DownloadsPlacesView(document.getElementById("downloadsRichListBox"));
     // Do not display the Places downloads in private windows
diff --git a/application/palemoon/components/places/content/controller.js b/application/palemoon/components/places/content/controller.js
index 4d3773905..e2ae2afb0 100644
--- a/application/palemoon/components/places/content/controller.js
+++ b/application/palemoon/components/places/content/controller.js
@@ -1603,7 +1603,7 @@ PlacesController.prototype = {
  * the view that the item(s) have been dropped on was not necessarily active.
  * Drop functions are passed the view that is being dropped on.
  */
-let PlacesControllerDragHelper = {
+var PlacesControllerDragHelper = {
   /**
    * DOM Element currently being dragged over
    */
diff --git a/application/palemoon/components/places/content/places.js b/application/palemoon/components/places/content/places.js
index 9ecdfebe0..a94193823 100644
--- a/application/palemoon/components/places/content/places.js
+++ b/application/palemoon/components/places/content/places.js
@@ -1377,7 +1377,7 @@ var ViewMenu = {
   }
 }
 
-let ContentArea = {
+var ContentArea = {
   _specialViews: new Map(),
 
   init: function CA_init() {
@@ -1511,7 +1511,7 @@ let ContentArea = {
   }
 };
 
-let ContentTree = {
+var ContentTree = {
   init: function CT_init() {
     this._view = document.getElementById("placeContent");
   },
diff --git a/application/palemoon/components/preferences/aboutPermissions.js b/application/palemoon/components/preferences/aboutPermissions.js
index 106d45f89..31b48f88e 100644
--- a/application/palemoon/components/preferences/aboutPermissions.js
+++ b/application/palemoon/components/preferences/aboutPermissions.js
@@ -13,15 +13,15 @@ Cu.import("resource://gre/modules/AddonManager.jsm");
 Cu.import("resource://gre/modules/NetUtil.jsm");
 Cu.import("resource://gre/modules/ForgetAboutSite.jsm");
 
-let gFaviconService = Cc["@mozilla.org/browser/favicon-service;1"].
+var gFaviconService = Cc["@mozilla.org/browser/favicon-service;1"].
                       getService(Ci.nsIFaviconService);
 
-let gPlacesDatabase = Cc["@mozilla.org/browser/nav-history-service;1"].
+var gPlacesDatabase = Cc["@mozilla.org/browser/nav-history-service;1"].
                       getService(Ci.nsPIPlacesDatabase).
                       DBConnection.
                       clone(true);
 
-let gSitesStmt = gPlacesDatabase.createAsyncStatement(
+var gSitesStmt = gPlacesDatabase.createAsyncStatement(
                   "SELECT get_unreversed_host(rev_host) AS host " +
                   "FROM moz_places " +
                   "WHERE rev_host > '.' " +
@@ -30,12 +30,12 @@ let gSitesStmt = gPlacesDatabase.createAsyncStatement(
                   "ORDER BY MAX(frecency) DESC " +
                   "LIMIT :limit");
 
-let gVisitStmt = gPlacesDatabase.createAsyncStatement(
+var gVisitStmt = gPlacesDatabase.createAsyncStatement(
                   "SELECT SUM(visit_count) AS count " +
                   "FROM moz_places " +
                   "WHERE rev_host = :rev_host");
 
-let gFlash = {
+var gFlash = {
   name: "Shockwave Flash",
   betterName: "Adobe Flash",
   type: "application/x-shockwave-flash",
@@ -290,7 +290,7 @@ Site.prototype = {
  *
  * Inspired by pageinfo/permissions.js
  */
-let PermissionDefaults = {
+var PermissionDefaults = {
   UNKNOWN: Ci.nsIPermissionManager.UNKNOWN_ACTION,   // 0
   ALLOW: Ci.nsIPermissionManager.ALLOW_ACTION,       // 1
   DENY: Ci.nsIPermissionManager.DENY_ACTION,         // 2
@@ -449,7 +449,7 @@ let PermissionDefaults = {
 /**
  * AboutPermissions manages the about:permissions page.
  */
-let AboutPermissions = {
+var AboutPermissions = {
  /**
   * Maximum number of sites to return from the places database.
   */  
diff --git a/application/palemoon/components/preferences/sanitize.js b/application/palemoon/components/preferences/sanitize.js
index 893155e62..15e6f58f4 100644
--- a/application/palemoon/components/preferences/sanitize.js
+++ b/application/palemoon/components/preferences/sanitize.js
@@ -3,7 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-let gSanitizeDialog = Object.freeze({
+var gSanitizeDialog = Object.freeze({
   onClearHistoryChanged: function () {
     let downloadsPref = document.getElementById("privacy.clearOnShutdown.downloads");
     let historyPref = document.getElementById("privacy.clearOnShutdown.history");
diff --git a/application/palemoon/components/preferences/sync.js b/application/palemoon/components/preferences/sync.js
index 9c7f1aa1f..f29728dbf 100644
--- a/application/palemoon/components/preferences/sync.js
+++ b/application/palemoon/components/preferences/sync.js
@@ -9,7 +9,7 @@ const PAGE_NO_ACCOUNT = 0;
 const PAGE_HAS_ACCOUNT = 1;
 const PAGE_NEEDS_UPDATE = 2;
 
-let gSyncPane = {
+var gSyncPane = {
   _stringBundle: null,
   prefArray: ["engine.bookmarks", "engine.passwords", "engine.prefs",
               "engine.tabs", "engine.history"],
diff --git a/application/palemoon/components/sessionstore/SessionStorage.jsm b/application/palemoon/components/sessionstore/SessionStorage.jsm
index 192352c49..64aef35a5 100644
--- a/application/palemoon/components/sessionstore/SessionStorage.jsm
+++ b/application/palemoon/components/sessionstore/SessionStorage.jsm
@@ -38,7 +38,7 @@ this.SessionStorage = {
 
 Object.freeze(SessionStorage);
 
-let DomStorage = {
+var DomStorage = {
   /**
    * Reads all session storage data from the given docShell.
    * @param aDocShell
@@ -142,7 +142,7 @@ let DomStorage = {
   }
 };
 
-let History = {
+var History = {
   /**
    * Returns a given history entry's URI.
    * @param aHistory
diff --git a/application/palemoon/components/sessionstore/SessionStore.jsm b/application/palemoon/components/sessionstore/SessionStore.jsm
index a8e7adfcc..f7c495be8 100644
--- a/application/palemoon/components/sessionstore/SessionStore.jsm
+++ b/application/palemoon/components/sessionstore/SessionStore.jsm
@@ -88,7 +88,7 @@ XPCOMUtils.defineLazyServiceGetter(this, "gScreenManager",
 // retrieved from a given docShell if not already collected before.
 // This is made so they're automatically in sync with all nsIDocShell.allow*
 // properties.
-let gDocShellCapabilities = (function () {
+var gDocShellCapabilities = (function () {
   let caps;
 
   return docShell => {
@@ -247,7 +247,7 @@ this.SessionStore = {
 // Freeze the SessionStore object. We don't want anyone to modify it.
 Object.freeze(SessionStore);
 
-let SessionStoreInternal = {
+var SessionStoreInternal = {
   QueryInterface: XPCOMUtils.generateQI([
     Ci.nsIDOMEventListener,
     Ci.nsIObserver,
@@ -4471,7 +4471,7 @@ let SessionStoreInternal = {
  * pinned, visible and hidden tabs in that and FIFO order. Hidden tabs are only
  * restored with restore_hidden_tabs=true.
  */
-let TabRestoreQueue = {
+var TabRestoreQueue = {
   // The separate buckets used to store tabs.
   tabs: {priority: [], visible: [], hidden: []},
 
@@ -4608,7 +4608,7 @@ let TabRestoreQueue = {
 // A map storing a closed window's state data until it goes aways (is GC'ed).
 // This ensures that API clients can still read (but not write) states of
 // windows they still hold a reference to but we don't.
-let DyingWindowCache = {
+var DyingWindowCache = {
   _data: new WeakMap(),
 
   has: function (window) {
@@ -4631,7 +4631,7 @@ let DyingWindowCache = {
 // A set of tab attributes to persist. We will read a given list of tab
 // attributes when collecting tab data and will re-set those attributes when
 // the given tab data is restored to a new tab.
-let TabAttributes = {
+var TabAttributes = {
   _attrs: new Set(),
 
   // We never want to directly read or write those attributes.
@@ -4677,7 +4677,7 @@ let TabAttributes = {
 // This is used to help meter the number of restoring tabs. This is the control
 // point for telling the next tab to restore. It gets attached to each gBrowser
 // via gBrowser.addTabsProgressListener
-let gRestoreTabsProgressListener = {
+var gRestoreTabsProgressListener = {
   onStateChange: function(aBrowser, aWebProgress, aRequest, aStateFlags, aStatus) {
     // Ignore state changes on browsers that we've already restored and state
     // changes that aren't applicable.
diff --git a/application/palemoon/components/sessionstore/_SessionFile.jsm b/application/palemoon/components/sessionstore/_SessionFile.jsm
index 9d40b9cca..62b4d1687 100644
--- a/application/palemoon/components/sessionstore/_SessionFile.jsm
+++ b/application/palemoon/components/sessionstore/_SessionFile.jsm
@@ -130,7 +130,7 @@ const TaskUtils = {
   }
 };
 
-let SessionFileInternal = {
+var SessionFileInternal = {
   /**
    * A promise fulfilled once initialization is complete
    */
diff --git a/application/palemoon/components/sessionstore/nsSessionStartup.js b/application/palemoon/components/sessionstore/nsSessionStartup.js
index 7f07e9050..04037c10e 100644
--- a/application/palemoon/components/sessionstore/nsSessionStartup.js
+++ b/application/palemoon/components/sessionstore/nsSessionStartup.js
@@ -50,7 +50,7 @@ function debug(aMsg) {
   Services.console.logStringMessage(aMsg);
 }
 
-let gOnceInitializedDeferred = Promise.defer();
+var gOnceInitializedDeferred = Promise.defer();
 
 /* :::::::: The Service ::::::::::::::: */
 
diff --git a/application/palemoon/components/shell/ShellService.jsm b/application/palemoon/components/shell/ShellService.jsm
index 12e275bdb..74632b692 100644
--- a/application/palemoon/components/shell/ShellService.jsm
+++ b/application/palemoon/components/shell/ShellService.jsm
@@ -17,7 +17,7 @@ XPCOMUtils.defineLazyModuleGetter(this, "WindowsRegistry",
 /**
  * Internal functionality to save and restore the docShell.allow* properties.
  */
-let ShellServiceInternal = {
+var ShellServiceInternal = {
   /**
    * Used to determine whether or not to offer "Set as desktop background"
    * functionality. Even if shell service is available it is not
diff --git a/application/palemoon/modules/BrowserNewTabPreloader.jsm b/application/palemoon/modules/BrowserNewTabPreloader.jsm
index 719a9e05e..778698fba 100644
--- a/application/palemoon/modules/BrowserNewTabPreloader.jsm
+++ b/application/palemoon/modules/BrowserNewTabPreloader.jsm
@@ -79,7 +79,7 @@ this.BrowserNewTabPreloader = {
 
 Object.freeze(BrowserNewTabPreloader);
 
-let Initializer = {
+var Initializer = {
   _timer: null,
   _observing: false,
 
@@ -120,7 +120,7 @@ let Initializer = {
   }
 };
 
-let Preferences = {
+var Preferences = {
   _enabled: null,
   _branch: null,
 
@@ -157,7 +157,7 @@ let Preferences = {
   },
 };
 
-let HiddenBrowsers = {
+var HiddenBrowsers = {
   _browsers: null,
   _updateTimer: null,
 
@@ -379,7 +379,7 @@ HiddenBrowser.prototype = {
   }
 };
 
-let HostFrame = {
+var HostFrame = {
   _frame: null,
   _deferred: null,
 
diff --git a/application/palemoon/modules/FormSubmitObserver.jsm b/application/palemoon/modules/FormSubmitObserver.jsm
index 72c5ca601..e4d3e765e 100644
--- a/application/palemoon/modules/FormSubmitObserver.jsm
+++ b/application/palemoon/modules/FormSubmitObserver.jsm
@@ -9,14 +9,14 @@
 
 "use strict";
 
-let Cc = Components.classes;
-let Ci = Components.interfaces;
-let Cu = Components.utils;
-
-let HTMLInputElement = Ci.nsIDOMHTMLInputElement;
-let HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement;
-let HTMLSelectElement = Ci.nsIDOMHTMLSelectElement;
-let HTMLButtonElement = Ci.nsIDOMHTMLButtonElement;
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+var Cu = Components.utils;
+
+var HTMLInputElement = Ci.nsIDOMHTMLInputElement;
+var HTMLTextAreaElement = Ci.nsIDOMHTMLTextAreaElement;
+var HTMLSelectElement = Ci.nsIDOMHTMLSelectElement;
+var HTMLButtonElement = Ci.nsIDOMHTMLButtonElement;
 
 this.EXPORTED_SYMBOLS = [ "FormSubmitObserver" ];
 
diff --git a/application/palemoon/modules/FormValidationHandler.jsm b/application/palemoon/modules/FormValidationHandler.jsm
index 05be510e1..ef7c2108b 100644
--- a/application/palemoon/modules/FormValidationHandler.jsm
+++ b/application/palemoon/modules/FormValidationHandler.jsm
@@ -8,15 +8,15 @@
 
 "use strict";
 
-let Cc = Components.classes;
-let Ci = Components.interfaces;
-let Cu = Components.utils;
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+var Cu = Components.utils;
 
 this.EXPORTED_SYMBOLS = [ "FormValidationHandler" ];
 
 Cu.import("resource://gre/modules/Services.jsm");
 
-let FormValidationHandler =
+var FormValidationHandler =
 {
   _panel: null,
   _anchor: null,
diff --git a/application/palemoon/modules/NetworkPrioritizer.jsm b/application/palemoon/modules/NetworkPrioritizer.jsm
index ea4a87790..23d688a30 100644
--- a/application/palemoon/modules/NetworkPrioritizer.jsm
+++ b/application/palemoon/modules/NetworkPrioritizer.jsm
@@ -34,8 +34,8 @@ const PRIORITY_DELTA = -10;
 
 
 // Variables
-let _lastFocusedWindow = null;
-let _windows = [];
+var _lastFocusedWindow = null;
+var _windows = [];
 
 
 // Exported symbol
@@ -64,7 +64,7 @@ function _handleEvent(aEvent) {
 
 
 // Methods that impact a browser. Put into single object for organization.
-let BrowserHelper = {
+var BrowserHelper = {
   onOpen: function NP_BH_onOpen(aBrowser) {
     // If the tab is in the focused window, leave priority as it is
     if (aBrowser.ownerDocument.defaultView != _lastFocusedWindow)
@@ -91,7 +91,7 @@ let BrowserHelper = {
 
 
 // Methods that impact a window. Put into single object for organization.
-let WindowHelper = {
+var WindowHelper = {
   addWindow: function NP_WH_addWindow(aWindow) {
     // Build internal data object
     _windows.push({ window: aWindow, lastSelectedBrowser: null });
diff --git a/application/palemoon/modules/PopupNotifications.jsm b/application/palemoon/modules/PopupNotifications.jsm
index 9b2e8e5d1..d2faf52c3 100644
--- a/application/palemoon/modules/PopupNotifications.jsm
+++ b/application/palemoon/modules/PopupNotifications.jsm
@@ -18,8 +18,8 @@ const ICON_ATTRIBUTE_SHOWING = "showing";
 
 const PREF_SECURITY_DELAY = "security.notification_enable_delay";
 
-let popupNotificationsMap = new WeakMap();
-let gNotificationParents = new WeakMap;
+var popupNotificationsMap = new WeakMap();
+var gNotificationParents = new WeakMap;
 
 function getAnchorFromBrowser(aBrowser) {
   let anchor = aBrowser.getAttribute("popupnotificationanchor") ||
diff --git a/application/palemoon/modules/SharedFrame.jsm b/application/palemoon/modules/SharedFrame.jsm
index 4d248ae5b..b9d59bfa9 100644
--- a/application/palemoon/modules/SharedFrame.jsm
+++ b/application/palemoon/modules/SharedFrame.jsm
@@ -18,7 +18,7 @@ const Cu = Components.utils;
  * when another one of the placeholder is meant to be displayed.
  * */
 
-let Frames = new Map();
+var Frames = new Map();
 
 /**
  * The Frames map is the main data structure that holds information
diff --git a/application/palemoon/modules/openLocationLastURL.jsm b/application/palemoon/modules/openLocationLastURL.jsm
index 0d653df28..3f58db8ce 100644
--- a/application/palemoon/modules/openLocationLastURL.jsm
+++ b/application/palemoon/modules/openLocationLastURL.jsm
@@ -10,11 +10,11 @@ Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm");
 
 this.EXPORTED_SYMBOLS = [ "OpenLocationLastURL" ];
 
-let prefSvc = Components.classes["@mozilla.org/preferences-service;1"]
+var prefSvc = Components.classes["@mozilla.org/preferences-service;1"]
                         .getService(Components.interfaces.nsIPrefBranch);
-let gOpenLocationLastURLData = "";
+var gOpenLocationLastURLData = "";
 
-let observer = {
+var observer = {
   QueryInterface: function (aIID) {
     if (aIID.equals(Components.interfaces.nsIObserver) ||
         aIID.equals(Components.interfaces.nsISupports) ||
@@ -35,7 +35,7 @@ let observer = {
   }
 };
 
-let os = Components.classes["@mozilla.org/observer-service;1"]
+var os = Components.classes["@mozilla.org/observer-service;1"]
                    .getService(Components.interfaces.nsIObserverService);
 os.addObserver(observer, "last-pb-context-exited", true);
 os.addObserver(observer, "browser:purge-session-history", true);
diff --git a/application/palemoon/modules/promise.js b/application/palemoon/modules/promise.js
index 7c96f02cf..74065c8db 100644
--- a/application/palemoon/modules/promise.js
+++ b/application/palemoon/modules/promise.js
@@ -24,7 +24,7 @@ module.metadata = {
   'stability': 'unstable'
 };
 
-let promised = (function() {
+var promised = (function() {
   // Note: Define shortcuts and utility functions here in order to avoid
   // slower property accesses and unnecessary closure creations on each
   // call of this popular function.
diff --git a/toolkit/mozapps/extensions/AddonManager.jsm b/toolkit/mozapps/extensions/AddonManager.jsm
index 681c4240a..3913c2088 100644
--- a/toolkit/mozapps/extensions/AddonManager.jsm
+++ b/toolkit/mozapps/extensions/AddonManager.jsm
@@ -88,9 +88,9 @@ Cu.import("resource://gre/modules/Log.jsm");
 // Configure a logger at the parent 'addons' level to format
 // messages for all the modules under addons.*
 const PARENT_LOGGER_ID = "addons";
-let parentLogger = Log.repository.getLogger(PARENT_LOGGER_ID);
+var parentLogger = Log.repository.getLogger(PARENT_LOGGER_ID);
 parentLogger.level = Log.Level.Warn;
-let formatter = new Log.BasicFormatter();
+var formatter = new Log.BasicFormatter();
 // Set parent logger (and its children) to append to
 // the Javascript section of the Browser Console
 parentLogger.addAppender(new Log.ConsoleAppender(formatter));
@@ -101,7 +101,7 @@ parentLogger.addAppender(new Log.DumpAppender(formatter));
 // Create a new logger (child of 'addons' logger)
 // for use by the Addons Manager
 const LOGGER_ID = "addons.manager";
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 // Provide the ability to enable/disable logging
 // messages at runtime.
diff --git a/toolkit/mozapps/extensions/DeferredSave.jsm b/toolkit/mozapps/extensions/DeferredSave.jsm
index d7f5b8864..7587ce83b 100644
--- a/toolkit/mozapps/extensions/DeferredSave.jsm
+++ b/toolkit/mozapps/extensions/DeferredSave.jsm
@@ -12,7 +12,7 @@ Cu.import("resource://gre/modules/osfile.jsm");
 Cu.import("resource://gre/modules/Promise.jsm");
 
 // Make it possible to mock out timers for testing
-let MakeTimer = () => Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+var MakeTimer = () => Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
 
 this.EXPORTED_SYMBOLS = ["DeferredSave"];
 
@@ -23,9 +23,9 @@ Cu.import("resource://gre/modules/Log.jsm");
 //Configure a logger at the parent 'DeferredSave' level to format
 //messages for all the modules under DeferredSave.*
 const DEFERREDSAVE_PARENT_LOGGER_ID = "DeferredSave";
-let parentLogger = Log.repository.getLogger(DEFERREDSAVE_PARENT_LOGGER_ID);
+var parentLogger = Log.repository.getLogger(DEFERREDSAVE_PARENT_LOGGER_ID);
 parentLogger.level = Log.Level.Warn;
-let formatter = new Log.BasicFormatter();
+var formatter = new Log.BasicFormatter();
 //Set parent logger (and its children) to append to
 //the Javascript section of the Browser Console
 parentLogger.addAppender(new Log.ConsoleAppender(formatter));
diff --git a/toolkit/mozapps/extensions/addonManager.js b/toolkit/mozapps/extensions/addonManager.js
index 862b1ea69..731e70c6c 100644
--- a/toolkit/mozapps/extensions/addonManager.js
+++ b/toolkit/mozapps/extensions/addonManager.js
@@ -31,9 +31,9 @@ const CHILD_SCRIPT = "resource://gre/modules/addons/Content.js";
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 
-let gSingleton = null;
+var gSingleton = null;
 
-let gParentMM = null;
+var gParentMM = null;
 
 
 function amManager() {
diff --git a/toolkit/mozapps/extensions/amInstallTrigger.js b/toolkit/mozapps/extensions/amInstallTrigger.js
index b83cbe60b..a18fe84c4 100644
--- a/toolkit/mozapps/extensions/amInstallTrigger.js
+++ b/toolkit/mozapps/extensions/amInstallTrigger.js
@@ -18,7 +18,7 @@ const MSG_INSTALL_ADDONS   = "WebInstallerInstallAddonsFromWebpage";
 const MSG_INSTALL_CALLBACK = "WebInstallerInstallCallback";
 
 
-let log = Log.repository.getLogger("AddonManager.InstallTrigger");
+var log = Log.repository.getLogger("AddonManager.InstallTrigger");
 log.level = Log.Level[Preferences.get("extensions.logging.enabled", false) ? "Warn" : "Trace"];
 
 function CallbackObject(id, callback, urls, mediator) {
diff --git a/toolkit/mozapps/extensions/amWebInstallListener.js b/toolkit/mozapps/extensions/amWebInstallListener.js
index 901beef07..ac6e2495d 100644
--- a/toolkit/mozapps/extensions/amWebInstallListener.js
+++ b/toolkit/mozapps/extensions/amWebInstallListener.js
@@ -37,7 +37,7 @@ const LOGGER_ID = "addons.weblistener";
 
 // Create a new logger for use by the Addons Web Listener
 // (Requires AddonManager.jsm)
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 function notifyObservers(aTopic, aBrowser, aUri, aInstalls) {
   let info = {
diff --git a/toolkit/mozapps/extensions/content/extensions.js b/toolkit/mozapps/extensions/content/extensions.js
index 6f2a47482..8d9c132e6 100644
--- a/toolkit/mozapps/extensions/content/extensions.js
+++ b/toolkit/mozapps/extensions/content/extensions.js
@@ -2456,7 +2456,7 @@ var gSearchView = {
     this._allResultsLink.setAttribute("href",
                                       AddonRepository.getSearchURL(this._lastQuery));
     this._allResultsLink.hidden = false;
- },
+  },
 
   updateListAttributes: function gSearchView_updateListAttributes() {
     var item = this._listBox.querySelector("richlistitem[remote='true'][first]");
diff --git a/toolkit/mozapps/extensions/content/update.js b/toolkit/mozapps/extensions/content/update.js
index 3d87f4d4b..afc74dca8 100644
--- a/toolkit/mozapps/extensions/content/update.js
+++ b/toolkit/mozapps/extensions/content/update.js
@@ -22,7 +22,7 @@ XPCOMUtils.defineLazyModuleGetter(this, "AddonRepository", "resource://gre/modul
 XPCOMUtils.defineLazyModuleGetter(this, "Task", "resource://gre/modules/Task.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "Promise", "resource://gre/modules/Promise.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "Log", "resource://gre/modules/Log.jsm");
-let logger = null;
+var logger = null;
 
 var gUpdateWizard = {
   // When synchronizing app compatibility info this contains all installed
@@ -169,7 +169,7 @@ var gOfflinePage = {
 }
 
 // Addon listener to count addons enabled/disabled by metadata checks
-let listener = {
+var listener = {
   onDisabled: function listener_onDisabled(aAddon) {
     gUpdateWizard.affectedAddonIDs.add(aAddon.id);
     gUpdateWizard.metadataDisabled++;
diff --git a/toolkit/mozapps/extensions/internal/AddonRepository.jsm b/toolkit/mozapps/extensions/internal/AddonRepository.jsm
index adcecbee7..76a7528c7 100644
--- a/toolkit/mozapps/extensions/internal/AddonRepository.jsm
+++ b/toolkit/mozapps/extensions/internal/AddonRepository.jsm
@@ -72,7 +72,7 @@ const LOGGER_ID = "addons.repository";
 
 // Create a new logger for use by the Addons Repository
 // (Requires AddonManager.jsm)
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 // A map between XML keys to AddonSearchResult keys for string values
 // that require no extra parsing from XML
@@ -101,7 +101,7 @@ const INTEGER_KEY_MAP = {
 };
 
 // Wrap the XHR factory so that tests can override with a mock
-let XHRequest = Components.Constructor("@mozilla.org/xmlextras/xmlhttprequest;1",
+var XHRequest = Components.Constructor("@mozilla.org/xmlextras/xmlhttprequest;1",
                                        "nsIXMLHttpRequest");
 
 function convertHTMLToPlainText(html) {
diff --git a/toolkit/mozapps/extensions/internal/AddonRepository_SQLiteMigrator.jsm b/toolkit/mozapps/extensions/internal/AddonRepository_SQLiteMigrator.jsm
index 128146bbe..11944ddf5 100644
--- a/toolkit/mozapps/extensions/internal/AddonRepository_SQLiteMigrator.jsm
+++ b/toolkit/mozapps/extensions/internal/AddonRepository_SQLiteMigrator.jsm
@@ -30,7 +30,7 @@ const LOGGER_ID = "addons.repository.sqlmigrator";
 
 // Create a new logger for use by the Addons Repository SQL Migrator
 // (Requires AddonManager.jsm)
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 this.EXPORTED_SYMBOLS = ["AddonRepository_SQLiteMigrator"];
 
diff --git a/toolkit/mozapps/extensions/internal/AddonUpdateChecker.jsm b/toolkit/mozapps/extensions/internal/AddonUpdateChecker.jsm
index d68a0f175..939e2e269 100644
--- a/toolkit/mozapps/extensions/internal/AddonUpdateChecker.jsm
+++ b/toolkit/mozapps/extensions/internal/AddonUpdateChecker.jsm
@@ -52,7 +52,7 @@ const LOGGER_ID = "addons.update-checker";
 
 // Create a new logger for use by the Addons Update Checker
 // (Requires AddonManager.jsm)
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 /**
  * A serialisation method for RDF data that produces an identical string
diff --git a/toolkit/mozapps/extensions/internal/Content.js b/toolkit/mozapps/extensions/internal/Content.js
index 29c0ed8ce..61a8b0323 100644
--- a/toolkit/mozapps/extensions/internal/Content.js
+++ b/toolkit/mozapps/extensions/internal/Content.js
@@ -8,9 +8,9 @@
 
 const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
 
-let {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
+var {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
 
-let nsIFile = Components.Constructor("@mozilla.org/file/local;1", "nsIFile",
+var nsIFile = Components.Constructor("@mozilla.org/file/local;1", "nsIFile",
                                      "initWithPath");
 
 const MSG_JAR_FLUSH = "AddonJarFlush";
diff --git a/toolkit/mozapps/extensions/internal/GMPProvider.jsm b/toolkit/mozapps/extensions/internal/GMPProvider.jsm
index a55457f6e..52affa9ba 100644
--- a/toolkit/mozapps/extensions/internal/GMPProvider.jsm
+++ b/toolkit/mozapps/extensions/internal/GMPProvider.jsm
@@ -64,11 +64,11 @@ XPCOMUtils.defineLazyGetter(this, "pluginsBundle",
 XPCOMUtils.defineLazyGetter(this, "gmpService",
   () => Cc["@mozilla.org/gecko-media-plugin-service;1"].getService(Ci.mozIGeckoMediaPluginChromeService));
 
-let messageManager = Cc["@mozilla.org/globalmessagemanager;1"]
+var messageManager = Cc["@mozilla.org/globalmessagemanager;1"]
                        .getService(Ci.nsIMessageListenerManager);
 
-let gLogger;
-let gLogAppenderDump = null;
+var gLogger;
+var gLogAppenderDump = null;
 
 function configureLogging() {
   if (!gLogger) {
@@ -443,7 +443,7 @@ GMPWrapper.prototype = {
   },
 };
 
-let GMPProvider = {
+var GMPProvider = {
   get name() { return "GMPProvider"; },
 
   _plugins: null,
diff --git a/toolkit/mozapps/extensions/internal/LightweightThemeImageOptimizer.jsm b/toolkit/mozapps/extensions/internal/LightweightThemeImageOptimizer.jsm
index fccde9a81..1e7d6b0d8 100644
--- a/toolkit/mozapps/extensions/internal/LightweightThemeImageOptimizer.jsm
+++ b/toolkit/mozapps/extensions/internal/LightweightThemeImageOptimizer.jsm
@@ -49,7 +49,7 @@ this.LightweightThemeImageOptimizer = {
 
 Object.freeze(LightweightThemeImageOptimizer);
 
-let ImageCropper = {
+var ImageCropper = {
   _inProgress: {},
 
   getCroppedImageURL:
@@ -119,7 +119,7 @@ let ImageCropper = {
   }
 };
 
-let ImageFile = {
+var ImageFile = {
   read: function ImageFile_read(aURI, aCallback) {
     this._netUtil.asyncFetch2(
       aURI,
@@ -158,7 +158,7 @@ let ImageFile = {
 XPCOMUtils.defineLazyModuleGetter(ImageFile, "_netUtil",
   "resource://gre/modules/NetUtil.jsm", "NetUtil");
 
-let ImageTools = {
+var ImageTools = {
   decode: function ImageTools_decode(aInputStream, aContentType) {
     let outParam = {value: null};
 
@@ -187,7 +187,7 @@ let ImageTools = {
 XPCOMUtils.defineLazyServiceGetter(ImageTools, "_imgTools",
   "@mozilla.org/image/tools;1", "imgITools");
 
-let Utils = {
+var Utils = {
   createCopy: function Utils_createCopy(aData) {
     let copy = {};
     for (let [k, v] in Iterator(aData)) {
diff --git a/toolkit/mozapps/extensions/internal/PluginProvider.jsm b/toolkit/mozapps/extensions/internal/PluginProvider.jsm
index 04a4f9d7c..cb07dcb12 100644
--- a/toolkit/mozapps/extensions/internal/PluginProvider.jsm
+++ b/toolkit/mozapps/extensions/internal/PluginProvider.jsm
@@ -23,7 +23,7 @@ const LOGGER_ID = "addons.plugins";
 
 // Create a new logger for use by the Addons Plugin Provider
 // (Requires AddonManager.jsm)
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 function getIDHashForString(aStr) {
   // return the two-digit hexadecimal code for a byte
diff --git a/toolkit/mozapps/extensions/internal/XPIProvider.jsm b/toolkit/mozapps/extensions/internal/XPIProvider.jsm
index 27ecee7d8..2c5e3dfa7 100644
--- a/toolkit/mozapps/extensions/internal/XPIProvider.jsm
+++ b/toolkit/mozapps/extensions/internal/XPIProvider.jsm
@@ -222,7 +222,7 @@ const LOGGER_ID = "addons.xpi";
 
 // Create a new logger for use by all objects in this Addons XPI Provider module
 // (Requires AddonManager.jsm)
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 const LAZY_OBJECTS = ["XPIDatabase"];
 
@@ -7822,7 +7822,7 @@ WinRegInstallLocation.prototype = {
 };
 #endif
 
-let addonTypes = [
+var addonTypes = [
   new AddonManagerPrivate.AddonType("extension", URI_EXTENSION_STRINGS,
                                     STRING_TYPE_NAME,
                                     AddonManager.VIEW_TYPE_LIST, 4000,
diff --git a/toolkit/mozapps/extensions/internal/XPIProviderUtils.js b/toolkit/mozapps/extensions/internal/XPIProviderUtils.js
index 2cef907f1..d26029455 100644
--- a/toolkit/mozapps/extensions/internal/XPIProviderUtils.js
+++ b/toolkit/mozapps/extensions/internal/XPIProviderUtils.js
@@ -29,7 +29,7 @@ const LOGGER_ID = "addons.xpi-utils";
 
 // Create a new logger for use by the Addons XPI Provider Utils
 // (Requires AddonManager.jsm)
-let logger = Log.repository.getLogger(LOGGER_ID);
+var logger = Log.repository.getLogger(LOGGER_ID);
 
 const KEY_PROFILEDIR                  = "ProfD";
 const FILE_DATABASE                   = "extensions.sqlite";