Rated 3 out of 5 stars
This is a nice cosmetic addition for the strange and boring blank icons that Firefox 3 gives us on lots of bookmarks and tabs but I agree with another comment here...you have to realise that in the world of computing there are more people who are NOT savvy and able to work things out without it being fed to them in simple steps or at least some easy instructions, than not! I am not one of them, I merely repair and build PCs and fix crap like Windows OS' daily but it makes me see just how many people there are that know very little. I would guarantee that there are loads of people who have downloaded your addon and then uninstalled it just because there are no instructions in the settings. First signs of confusion and people like that are off. they uninstall cos they don't want to mess their PC up.
Just add a few lines of text mate and it'll be perfect!
But from me...thank you, it's perfect! :)