Rated 2 out of 5 stars

If it only did tab coloring, it would be great.
But it does other annoying thing that made me uninstall it. It changes the position where new tab opens, it changes background color of all your tabs (instead of just the ones you want) and it assigns a random color to every new tab. Those things make it bigger pain than gain.

This review is for a previous version of the add-on (2.1.3).