Bug 630364 - Do not warn when opening youtube. r=blassey. a=blocking-fennec

mobile/app/mobile.js

@@ -108,6 +108,7 @@ pref("offline-apps.quota.warn", 1024); // kilobytes
 /* protocol warning prefs */
 pref("network.protocol-handler.warn-external.tel", false);
 pref("network.protocol-handler.warn-external.mailto", false);
+pref("network.protocol-handler.warn-external.vnd.youtube", false);
 
 /* http prefs */
 pref("network.http.pipelining", true);