great, but not as good on a Mac Rated 4 out of 5 stars

This is definitely the best of its kind. Unfortunately what ihavenoneedfornicknames said a year ago still apply: on a Mac, the active tab's color is always gray (the default), and the overlay of the color doesn't match the curved edges of tabs.

This review is for a previous version of the add-on (1.4.6.1-signed.1-signed).