Okay from Ed's post at * https://support.mozilla.com/en-US/questions/789712#answer-143800 it looks like you do have to go to an earlier version. Another alternative would be to run two versions of Firefox each with their own profile. You can install the latest version of Firefox 3.6 available from http://www.mozilla.com/en-US/firefox/all-older.html - it will automatically use your current bookmarks, passwords etc. At the end of the install don't let the install start Firefox for you, instead exit the install, and start Firefox in your normal manner that should help prevent you from creating a new profile and then using the wrong profile. When you learn that you can go on to Firefox 4, Firefox 5, or Firefox 6, you may be interested in the following: You can make Firefox 4.0.1 look like Firefox 3.6.17, see numbered items 1-10 in the following topic [http://dmcritchie.mvps.org/firefox/firefox-problems.htm#fx4interface Fix Firefox 4.0 toolbar user interface, problems (Make Firefox 4.0 look like 3.6)]