You are trying to deploy Firefox updates but the deployment fails with the error message "Fatal Error" or the installation status remains successful, but the update fails.
You might face the above mentioned issue, if the users have logged on and Firefox browser is open on their computer.
It is preferable to install Firefox updates while no users are logged in, or Firefox browser is not used by any logged on users.
Applies to: MAC Patch Deployment, Patch Installation Failure, Patch Installation Error, Patch Errors
Keywords: Patch Installation, Patch Management, Patch Deployment Error, Patch Installation Failure