> Which generally means you need to try to remain compatible with it, with ends with "you have to follow Google's development direction"
You certainly don't need to do any of that. Amazon didn't do that and they have a pretty successful line of tablets. Even their crappy phone was far better than the Firefox OS phone.
Firefox could fork AOSP, break compatibility (if they want), rename it, and never look back. If they did this, they would be far ahead of where they are right now with Firefox OS.