I noticed in my Firefox-U3 profile folder, there are about 60 backup copies of my bookmarks.html and my prefs.js files. This is way too many backups, but I cant seem to find any way to stop them from being generated. It seems there are 2 of each backed up every time I exit firefox. They are taking up too much space and see no real need for more than 1 or 2 backup copies. HELP!