firefox is the best. i can't wait til they have a new version. the tabs are so cool. IE7 can never out beat it.
There are so many Firefox plugins but it can become quite heavy to handle, it sometimes requires a lot of RAM.
IMO mozila firefox is also da best for me... faster, simpler, easier to use and is up to date... the downside is not all sites u can go with firefox IE is very slow, more prone to spyware and viruses and is behind firefox
i use firefox too, hate it when some site dont work on firefox, i like the new IS its really pretty but its so much slower
if the sites dont work in firefox just get the ie plugin that allows u to open ie as a tab in firefox: https://addons.mozilla.org/firefox/1419/