Rated 5 out of 5 stars

This plugin has now replaced the Greasemonkey script I used to use. The performance of this plugin is now excellent, and number of sites supported are phenomenal. It is also fairly easy to add support for new sites, although the interface could be a little more intuitive.

Old Review:
I've been using a Greasemonkey script to do this for a while now, so when I saw this I had to try it. This supports way more sites than the GM script, and provides much more functionality, unfortunately it causes my browser to hang for several seconds every time a new page loads.

This review is for a previous version of the add-on (0.4.0.5).