I found out about this from: http://www.raymond.cc/blog/archives/2011/04/01/hidden-list-of-visited-websites-by-flash-player/ This is interesting. I have CCleaner installed along with the CCenhancer. I also have Better Privacy installed in Firefox and have the following settings and it still does not clear the flash player history. You can view your flash player history by clicking here: http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html UPDATE: I was wrong I found checking "Also delete Flashplayer Default cookie." takes care of this issue. But CCleaner does not.