Rated 2 out of 5 stars
This was very useful extension (5 stars at first), but with the close button being moved off the tab it has become less than useful to me. I'm not sure whose fault this is, FF or the creator of the extension, but putting it off to the right and closing tabs only in reverse opened order is simply a bad choice and counter productive.
I can live without this until it's fixed or someone can do a better job of thinking this through.
It should be fixed in beta2. That should show up automatically in a few hours/days or you can get it by clicking on "Version Information" and the Version 1.2beta link at the bottom of the add-ons page.