If you have your own plugins or native libraries that none of the Firefox OS stuff will cover functionality for now or in the future, then no, it's not enough.

If you have your own plugins or native libraries that none of the Firefox OS stuff will cover functionality for now or in the future, then no, it's not enough. Also games are huge part of mobile sales, and sales is the biggest driver of developer adoption. I feel like webOS's slowness in adopting native access kneecapped them in game porting. As a new platform, the less barriers the better to getting games ported, the better.