Rated 5 out of 5 stars
Doesn't do much but does it well.
I also tested some of the problems previous reviewers mentioned, I can't repeat any of them.
I'm running Mac OS X 10.6.? using Firefox 13.0.
It's a bummer that the add-on is so good. I like to give an extra star for restartless add-ons but I can't give it 6 stars so I'll contribute less to the average rating than I'd like.