This is a constant bug that happens with Firefox... been happening for years. I close the program and, later, when I reopen, it won't open because it claims to be already running. I select task manager and the damn program is in there using up RAM. I close it and then Firefox will open. This is Windows XP. Also, it seems whenever I click on a link in an email Firefox is unobtainable because it needs to install an update. Lord knows how many updates you do a month... it always coincides with my wanting to use it.