i use mozilla as my main browser on windows and i find it so much better than ie. the tabs feature is amazing - only having to have one browser window open rather than about 10. have only ever had it crash once in the last few months & i don't find it slow at all. then again i do have 1gb of ram - i think it's maybe not so good on a machine with not much ram. i've only come across a couple of pages which don't render properly in it - mostly microsofts msdn site.