Index: ext/common.js
===================================================================
--- a/ext/common.js
+++ b/ext/common.js
@@ -12,17 +12,16 @@
  * 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";
 
-(function()
 {
   window.ext = {};
 
   let EventTarget = ext._EventTarget = function()
   {
     this._listeners = new Set();
   };
   EventTarget.prototype = {
@@ -44,9 +43,9 @@
       return results;
     }
   };
 
 
   /* Message passing */
 
   ext.onMessage = new ext._EventTarget();
-}());
+}