Useful, but buggy on Firefox 4 on Mac OSX 10.6.7 Rated 3 out of 5 stars

The color matching is correct for inactive tabs, but active tabs revert back to the normal default gray (it didn't use to before). Also, the overlay of the color don't match the curved edges of the tab border.
Works fine on Windows, but the above problems apply to Mac OSX.

This review is for a previous version of the add-on (1.4.1-signed.1-signed).