Rated 3 out of 5 stars

I love the idea of this extension, and dislike using tabs instead of windows to manage my browsing (why duplicate the functions of the taskbar?). I also use a lot of Firefox add-ons, so it took me a while to figure out that this was the one that was causing an extra blank window to open whenever I clicked on a link in and email message displayed in Kmail. I'm not sure how far this problem extends, and if you don't have it, this may be just what you're looking for.