Rated 4 out of 5 stars

But I have a couple of problems with it. I can't use the right-click menu in the tabs area, because it conflicts with TabMixPlus (I know this problem isn't easy to resolve) & it needs an indicator of some sort (as other reveiws have said). I did notice the dotted underline on the private tabs, but it's barely visible in most cases.

This review is for a previous version of the add-on (0.2.1.2).