Issue 5028 - Use browser namespace

ext/common.js

Index: ext/common.js
===================================================================
--- a/ext/common.js
+++ b/ext/common.js
@@ -14,22 +14,16 @@
  * 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";
 
 (function()
 {
-  // Both Edge and Mozilla Web Extensions use the namespace
-  // 'browser' instead of 'chrome'. Edge has chrome namespace defined,
-  // in some cases, but only with one property: 'app'.
-  if (typeof chrome == "undefined" || typeof chrome.extension == "undefined")
-    window.chrome = window.browser;
-
   window.ext = {};
 
   let EventTarget = ext._EventTarget = function()
   {
     this._listeners = new Set();
   };
   EventTarget.prototype = {
     addListener(listener)
@@ -46,41 +40,29 @@
 
       for (let listener of this._listeners)
         results.push(listener(...args));
 
       return results;
     }
   };
 
-  // Workaround since HTMLCollection, NodeList, StyleSheet and
-  // CSSRuleList didn't have iterator support before Chrome 51.
-  // https://bugs.chromium.org/p/chromium/issues/detail?id=401699
-  let arrayIterator = Array.prototype[Symbol.iterator];
-  if (!(Symbol.iterator in HTMLCollection.prototype))
-    HTMLCollection.prototype[Symbol.iterator] = arrayIterator;
-  if (!(Symbol.iterator in NodeList.prototype))
-    NodeList.prototype[Symbol.iterator] = arrayIterator;
-  if (!(Symbol.iterator in StyleSheetList.prototype))
-    StyleSheetList.prototype[Symbol.iterator] = arrayIterator;
-  if (!(Symbol.iterator in CSSRuleList.prototype))
-    CSSRuleList.prototype[Symbol.iterator] = arrayIterator;
 
   /* Message passing */
 
   ext.onMessage = new ext._EventTarget();
 
 
   /* Background page */
 
   ext.backgroundPage = {
-    sendMessage: chrome.runtime.sendMessage,
+    sendMessage: browser.runtime.sendMessage,
     getWindow()
     {
-      return chrome.extension.getBackgroundPage();
+      return browser.extension.getBackgroundPage();
     }
   };
 
 
   /* Utils */
 
-  ext.getURL = chrome.extension.getURL;
+  ext.getURL = browser.extension.getURL;
 }());