It seems to be the last RC before the final release of Firefox 2.0. It is just released and seems to be working great. Almost every feature of Firefox 2.0 is there as is reported by website as the features were freezed way back since my last post about RC1.
Hopefully, Firefox is going to be released this month (as IE7 is also due in this month) which is already late by couple of months. I like the best about new version is in-built spell check.