Works with 3.6-see Chris's post Rated 5 out of 5 stars

Chris, thank you for revising this to work with FF 3.6. I would never have used it with my old CRT monitor, but with my new wide-screen LCD monitor, I didn't hesitate installing it. I really enjoy it. Thanks of the URL link.

This review is for a previous version of the add-on (2.8.1).