[Mars]

I am wondering what is all this hype with firefox? Just wow good of a browser is this thing. All I've been using for years is of course, Internet Explorer. Or some Firefox users may call it "Internet ExPloder". Anyways, I was thinking of trying it out.
Is it a Freeware?
How about all of my settings. Do I have to redo everything again?
Can I run both Firefox and IE at different times whenever I want?
Is there security updates for it every so often?
Is there a website that tells me all of this?

Any info will be appreciated. Thanks.