Originally Posted by Tr1cK
There's a lot of was and weres in your comments about Firefox.
True. But XUL concept of Firefox has not changed, also rather primitive functionality that has to be enhanced by 10+ plugins remained (which make it crawl).
UI of even Firefox 3 is very primitive, still reminds me of IE6 UI from 2001. There is not even "new tab" button by default, they still mimic IE6 UI behaviour... IE8 and Safari 4 are true modern browsers. Perhaps also Opera.