| Index: lib/prefs.js | 
| diff --git a/lib/prefs.js b/lib/prefs.js | 
| index e1aa3f751c5feb430e5dfb83ada7917bd777bd9f..066a59feba603d801509e2ef3b2820e84fc68765 100644 | 
| --- a/lib/prefs.js | 
| +++ b/lib/prefs.js | 
| @@ -177,6 +177,11 @@ defaults.suppress_first_run_page = false; | 
| defaults.additional_subscriptions = []; | 
| /** | 
| + * Whether to enable the use of Safari's content blocker mechanism. | 
| + */ | 
| +defaults.safariContentBlocker = false; | 
| + | 
| +/** | 
| * @namespace | 
| * @static | 
| */ |