Yeah I'm very happy with Firefox desktop no matter the OS. The Android version of Firefox is not nearly as polished or capable at the moment. It's a shame because I really do still use it a ton. It has great potential.
Ah, very few crashes on Android (using it right now), but my biggest gripe is that the first page load can take a while to even start, after opening a new tab or typing something in the address bar. Tapping on stuff lyke the reply/comment button is pretty fast though.