If you've been holding out for Firefox 2.0 (although why would you?), you'll be glad to know that Firefox 2.0 is now available. Lots of new goodies in this release: inline spell checking (the greatest feature yet), better tabbed browsing, session saver, and more. It doesn't get much better than this (until Firefox 3.0, that is).
While you're upgrading, make sure you have the latest versions of CoLT and Googlebar Lite.