Rated 4 out of 5 stars

Small and effective though I suspect there's a memory leak somewhere. Go ahead and check the memory usage before and after installing this extension. Also, when you have a lot of tabs open (enough to have the blue arrow show up to scroll the tabs), the next time you start the browser, the tabs will be opened out of order.

This review is for a previous version of the add-on (0.4.1).