I wasn't intending to correct you ... I just wanted to make sure you knew which program my advice applied to.
I do recommend the latest version. It's more stable, a couple new features, and a bunch of security updates. Pretty much every Add-on (previously called Extensions) have been updated for 2.x
Also, while you're updating, I highly recommend
http://adblockplus.org/ for inline adblocking. Firefox already does a great job with popups, but this blocks advertisements that appear in the page as well.