| Index: lib/filterNotifier.js | 
| =================================================================== | 
| --- a/lib/filterNotifier.js | 
| +++ b/lib/filterNotifier.js | 
| @@ -15,16 +15,18 @@ | 
| * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>. | 
| */ | 
|  | 
| /** | 
| * @fileOverview This component manages listeners and calls them to distributes | 
| * messages about filter changes. | 
| */ | 
|  | 
| +"use strict"; | 
| + | 
| /** | 
| * List of registered listeners | 
| * @type function[] | 
| */ | 
| let listeners = []; | 
|  | 
| /** | 
| * This class allows registering and triggering listeners for filter events. | 
|  |