I usualy use Firefox, but if for some reason a webpage doesnt open with Firefox then I use IE7, as I have found out that some websites work better with IE7 than Firefox.
Firefox, I love the tabbed windows, so my Start Bar has lots of space left. And opening a new window is with a click of 2 keys :3
Firefox is amazingly handy.
Main browser is opera,but sometimes use IE or firefox. IE is too slow compare to others and it keeps on lagging. And is safari really that good? I might try that..