Mozilla should instead focus on freeing Android from it's dependency on Google. Everyday, apps become more and more dependent on Google Play services, the proprietary set of libraries that Google controls on Android devices. Developers need an open version of Google Play Services (Mozilla Mobile Services?) and even a competitive app store (10% commission instead of 30%?). The natural next step would be to create their own distribution of Android and release it on quality hardware. Not only would they be furthering the cause of free software and open computing, but they would have a revenue stream to continue their mission.