Rated 5 out of 5 stars

This add-on for Firefox is so stunningly simple, essential, and perfect that it should not be an add-on. Future versions of Firefox should come preloaded with this functionality. Smart Bookmarks Bar hides the text next to all of the icons in your Bookmarks Bar, and reveals the text for each bookmark individually on mouse-over. I, too, have experienced no problems whatsoever with this add-on in relation to Firefox 3.5.