''Firefox 5 - BACK arrow on toolbar - no drop down:'' Back button problems -- right-click on tab for tab history, or hold a couple of seconds. You've always been able to right-click the button, the holding of the button was added in Fx4 like single button Mac usage. See item,#5 in the following... You can make Firefox '''Firefox 5.0''' look like Firefox 3.6.18, 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 5.0, or 4.0.1, look like 3.6)]. ''Whether or not you make changes, you should be aware of what has changed and what you have to do to use changed or missing features.''