Index: lib/prefs.js
diff --git a/lib/prefs.js b/lib/prefs.js
index 4705ba02603ec1ce256c6b7bc3b0ea13b7be80c0..a62cb6f5ba9df2f51e3123cd45b83e5f51099346 100644
--- a/lib/prefs.js
+++ b/lib/prefs.js
@@ -39,7 +39,9 @@ let defaults = {
   update_last_error: 0,
   update_soft_expiration: 0,
   update_hard_expiration: 0,
-  currentVersion: "0.0"
+  currentVersion: "0.0",
+  notificationdata: {},
+  notificationurl: "https://notification.adblockplus.org/notification.json"
 };
 
 let values = Object.create(defaults);