Whats Better Firefox or IE

[Chillosophy]

I use Firefox because of all the great extensions, but I must say I think Opera is the best of all. Fast, low memory usage, good W3C standards. Firefox is awesome, but it takes up way too much resources and it crashes a lot. I've tried to figure out if it's caused by some extension, but despite all my efforts I still don't know 

IE7 is fast, but that's about it. I don't like anything about it.