I’ve had Firefox 5 since it came out, and I don’t think it’s ever crashed on me, except for once when trying to load a specific website (which also crashed Chrome when I tried it on that).
Just spent some time today trying to use Chrome (again), but it’s just too annoying. There’s so many basic features it doesn’t have, or that just don’t work in the way I think they should. I’ll get Firefox 6, mostly because every time I’ve updated Firefox, it’s got better, even though I never thought it needed to. Don’t have any reason to change, so I’ll stick with it.