The last comment demonstrates why open source software will never become widely accepted and why MS still have no serious threat. Most users just want things to work, no messing, no going into setting and tweaking. If firefox cannot do this then people will scurry back to IE. Calling the users stupid is a bit like a mechanic calling someone stupid for not understanding the working of the internal combustion engine.
Since the last few updates firefox crashes after a few hours use and refuses to be killed, I have to reboot. Personally I will use the most reliable browser, and right now that is IE warts and all.