Very useful indeed - a couple of minor changes would get it 5 stars Rated 4 out of 5 stars

Works very well.

Giving 4 stars right now because the important option for manual tab color selection works but is hidden (manual edit to XUL and about:config needed to display radio option and set scheme=3), because it doesn't seem to work with multiple tab handler yet (which is very useful for this kind of extension), and because of the known issue that if you disable "aggressive handling" the coloring won't work but if you enable it, the current tab isn't highlighted as normal (it gets its "ColorfulTab" color only, like normal) so it's only bold, not colored, and hard to see.

These should be easy to fix, and if the developer can do it then I don't see why this wouldn't get 5 stars immediately :)

Thank you!

This review is for a previous version of the add-on (17.6.1-signed).