chrome is infinitely faster for me, but it's lacking some of the extensions i rely on for javascript hackery (debugging complex stuff) in firefox w/ firebug + web developer toolbar.
more importantly, the roboform 'extension' is a hilariously bad implementation, and lastpass just sucks comparatively. so i'm living without formfill a lot of my day.
the fact that i picked chrome over firefox and reverted myself a decade by not having roboform should tell you a lot about how much better chrome is otherwise