Yes I want a critique and help, tell me how bad you think the site is in firefox please, do I need to fix it

But I also want to talk about my problem here

I think my main problem is with <div>'s, they dont fit into things in the way they do with IE (the normal way). I have never seen a problem that IE has with them that firefox does not so I dont see why fire fox just displays them in the same way as IE