This is more of a change request. When updating Firefox on macOS to a newer version, the update helper will throw up the permissions dialog first, and only then display the dialog with the notice. This causes the permissions dialog to lose focus, and a click is needed to regain focus to enter the administrator credentials. In addition, the notice is hidden by the permissions dialog so it is pretty useless for people who are not familiar with the process. It would be better to incorporate the notice into the permissions dialog text if possible.