Hi Rhonda, Firefox normally runs with reduced (non-Administrator) privileges to limit the potential damage an attack page could do to your system. Installing updates usually requires higher privileges, so that is what the background service is used for. If you disable the service, Windows may show a system prompt for permission to install updates, as described in this article: [[What is the Mozilla Maintenance Service?]] It's also possible you won't get that dialog and Firefox might tell you it can't update and say you should download a new installer. I think you'll be fine either way, but using the background service is a bit more convenient.