Firefox 2.0 RC2 has been released. It is well polished and has good number of features which includes, better tab handling, anti-phishing, inline spell check,etc. We use to face the problem of version incompatibilites of existing firefox extensions while we test beta/release-candidate versions. Some time even after official release of Firefox new version, the extension developer don't update their extension immediately. If there is no major API change in firefox, most of the old extensions works...