Don't use version 1.0.6 with FIrefox 14 or higher Rated 1 out of 5 stars
This add-on has a massive bug with Firefox 14 where it'll slowly start eating up CPU until it's constantly using up a full core. Avoid it like the plague until Google releases an update.This review is for a previous version of the add-on (1.0.6).
Thank you for reporting the problem. We have submitted a fix and it is currently pending review.
EDIT: We have just released v1.1.1 which reduces the CPU usage by this extension and improves the user experience.