Rated 4 out of 5 stars

Works exactly as expected- you can even scroll when the mouse is on the blank space next to the tabs. This is the one feature I missed from Chrome on Linux, and this provides me a way to just not care. XD

Very simple and obvious options, as well. I'm giving this 4 stars because it's version-dependent.

This review is for a previous version of the add-on (20100626.1-signed).