I upgraded to 9.1.008.000 today and installed the ZoneAlarm toolbar for FireFox. I found that after I did that firefox no longer shut down clean. The window would go away but the firefox.exe was still running in the task manager. FireFox could not be restarted until the .exe was killed. I also found that I could not use all of the functions in my online banking because it is preventing the opening of a new window or tab. I also noticed that the pull-down menus on FireFox were also displaying with blank lines. I disabled the ZoneAlarm toolbar and all works again in FireFox.