Bug 929689 - Fix for NewTabUtils exception in metrofx: set thumbnail expiration pref the code expects. r=mbrubeck
Bug 942620 - The "quit-application-requested" notification is sent twice when closing the last tab. r=Dao
Bug 959275 - Add telemetry support for custom dev tools. r=mratcliffe
Bug 961238 - Make an abstract ContentProvider class. r=margaret