Thats not really a competition piuyto.Everyone knows Firefox is 100%, overall better then Internet explorer.With the right add-on's you can do just about anything with Firefox.
Well besides that there's already a topic on this? Right there o_o ie vs. firefox
Plus this is sorta pointless, as I said in that forum, it all depends on your computer, and what you like better, I don't like Firefox, yes, it's better, but IE is, for me, more smooth running on this computer, and it is easier for me to use.