Firefox is greatness, it's the single best browser, IMO. IE is a giant piece of proprietary shit, it's horribly coded, and not even coded correctly. It S.U.C.K.S.

Google Chrome is also quite nice, though it's a stripped down firefox(Don't try to say it isn't, as they themselves admit it uses a large amount of firefox code).

Plus you don't have to pay for ANTHING, and you have plugins like noscript that allow you to avoid that dumb ass rickroll things.