For me, Firefox is hands down THE BEST BROWSER by far on android. I find it quicker and smoother than Chrome (my previous pick.) But it has 2 big pluses: text wrap to zoom and flash support.
It's still in beta but it's so darn smooth you'd never know.
I liked Firefox for Android, but I really don't know which is the best. It's a shame Mozilla won't port Firefox to iOS.
They probably would if they could ...
I guess Apple won't let them use the Firefox engine to render pages, isn't that the issue?