アドオン

I had to create another user to log on but you can find my previous persona at the end of the post.
The previous version should be used with 3.6.xx or earlier.This version however should suit Firefox 4 default theme and look.Note that it will not look so good if you enable the bookmarks bar but it does account for the Addon Bar.

https://www.getpersonas.com/en-US/persona/248504