This isn't about Firefox OS. It's about the Firefox browser app on Android. https://play.google.com/store/apps/details?id=org.mozilla.fi...

Take the Nexus 4, a device with decent specs even by today's standards, and load up Firefox OS. It's mostly a usable (if slightly buggy) experience, but it still isn't "good enough" to replace Android, iOS, or Windows Phone in my testing even on good hardware. I would call it something between a modern feature phone and a smartphone. It's getting better, but it's still not there yet.

Why throwing baby with the bathwater?

Android is a good os, with many existing apps and libraries... why redo everything? Just cut the bad bits.

Blackberry 10