Via right click --> customize, its clear anything can be moved. that is a strength of firefox. I am trying to get rid of a 2nd row by moving the Bookmarks Toolbar onto the line with the Address bar. When doing so the '''address bar is reduced to a 2 letter width''' at most. I cannot find a way to make ti work, with the spaces and flexible space. It doesn't matter. Even though the movement is allowed, did Firefox not intend for this to be done? I really don't need a 12 inch address bar and want to have my bookmarks next to it.