Got a notice this morning that update 3.6.21 was ready for download/install. When I reopened Firefox said it could not download and to check that no other copies of Firefox running on computer. I have a setup on the computer for both Admin and User. The download/installation seems to have worked for the Admin option, but for the User option it signals as noted above re: check other copies running. Do I have to uninstall the previous 3.6.20 on the User option - if so how do I do that as being the user cannot delete, only the Admin. Thanks - Joe Fincik