Internet Explorer sucks hands down. You go for Internet Explorer you are basically screwed then. Don't complain about viruses, because IE will give all you ever need. Firefox prevents these things, it's a way faster browser, easier to use and navigate, is cleaner, more efficient, more useful extensions, better quality, skinable, correctly displays css according to standards, and just more that IE can't handle. And why is that? Because Microsoft has stated that they won't listen to our suggestions on supporting standards, because we should be supporting them in standards, not the other way around.
Basically they want web-developers to make sites that work for them, rather than them make a browser that works for our coding. Well too bad, you lost Internet Explorer. And one day you will finally cease to exist. Because everyone is getting to darn tired of you and your ways of being a total monopoly dictator.
By the way, I got some of this info from this site: nomoreiehacks.org
It's a good one-page website.. Spread it around to prevent others from using IE! Down with IE! FireFox has truly taken back the web.