I have been using IE 7 for a couple of months now and am not enjoying the experience so am considering trying an alternative browser Which is best ? For's and Againsts please...
Firefox is so many times better than IE. It's free software, so anyone that spots a bug can either send it off to someone who knows how to fix it, or fix it themselves. Security problems get fixed in days, not weeks (like at Microsoft).
There is an extension for everything you want to ever do. I'd recommend downloading Tab Mix Plus, Adblock Plus, and Adblock Updater as the first 3. Another great is fasterfox.