See http://forums.mozillazine.org/viewtopic.php?f=38&t=685365 - Customising the Firefox 3 Location Bar Old Location Bar: https://addons.mozilla.org/firefox/addon/7637 --- Entries in the location bar drop down list with a yellow (blue on Mac) star at the right end are bookmarks. You can easily remove such a bookmarked item that shows in the list if you open that url in a tab and click the yellow star in the location bar. This will open the Edit This Bookmark dialog and you can click the Remove button to remove the bookmark. If you update to Firefox 3.5.x or 3.6.x then you have more options for the location bar behavior. --- [[Clearing Location bar history]] [[Cannot clear Location bar history]] [[Smart Location Bar]]