umm...everything
Increased security; cool themes; better stability*; in the event of a crash, it remembers exactly which site(s) you were on and pulls it back up for you upon restart; functionality can be increased beyond the browser's basic features with optional extensions; this is the browser that INVENTED tabbed browsing (along with Netscape) so all links open in new tabs**; more.
Yes, it's free and the latest version can be downloaded at
http://www.mozilla.com/en-US/ .
* Some Vista users are complaining about browser crashing when opening Java windows, and blank pages, etc. However, I don't seem to have any of these issues. I do have the "login" issue, though, and since a good amount of my internet time is spent browsing forums, it gets very annoying to have to log in every time. It is partially alleviated by the fact that it stores my login/password info, but it's still annoying to have to click " log in" every time. :banging:
** this is the default setting; can be altered through the "options" menu.
In fact, take away the login issue and there's absolutely no reason to use IE. HOWEVER, some sites still perform best with IE so I still use it to display those pages. Firefox (FF) does have an addon that allows you to use the IE engine in FF, but it's of limited functionality.
Probably more than you wanted, but oh well, whatever.