Someone sent me a link to this site. It's a good read. The Mozilla guys have done a very nice job with Firefox, no doubt, but the mythology around the thing has become epic. The Mozilla guys have been been mostly good about not spreading these too much from what I can tell, so it's really the fanboys and the press.
I haven't verified everything on the site nor have I read it completely even, but a quick pass seems consistent with things I know.
Anyway, read it and judge for yourself.