Rated 5 out of 5 stars

I've been using this extension for about 2 years. It is a must-have if you have more than one gmail account. very customizable.

Regarding the review entitled, "watch out":
On a new computer, I just installed it under FF 2.0.0.4 and it is working fine.

This review is for a previous version of the add-on (0.5.3).