Issue 4795 - Use modern JavaScript syntax

stats.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+"use strict";
+
 {
-  let backgroundPage = ext.backgroundPage.getWindow();
-  let require = backgroundPage.require;
-  let getBlockedPerPage = require("stats").getBlockedPerPage;
-  let FilterNotifier = require("filterNotifier").FilterNotifier;
-  let Prefs = require("prefs").Prefs;
+  const {require} = ext.backgroundPage.getWindow();
+
+  const {getBlockedPerPage} = require("stats");
+  const {FilterNotifier} = require("filterNotifier");
+  const {Prefs} = require("prefs");
 
   let currentPage;
-  let shareURL = "https://adblockplus.org/";
+  const shareURL = "https://adblockplus.org/";
 
   let messageMark = {};
   let shareLinks = {
     facebook: ["https://www.facebook.com/dialog/feed", {
       app_id: "475542399197328",
       link: shareURL,
       redirect_uri: "https://www.facebook.com/",
       ref: "adcounter",
       name: messageMark,
       actions: JSON.stringify([
@@ skipping 79 matching lines @@
 
   function toggleIconNumber()
   {
     Prefs.show_statsinicon = !Prefs.show_statsinicon;
     document.getElementById("show-iconnumber").setAttribute("aria-checked", Prefs.show_statsinicon);
   }
 
   document.addEventListener("DOMContentLoaded", onLoad, false);
   window.addEventListener("unload", onUnload, false);
 }