Posted by Stefan Kanthak on Mar 16

Hi @ll,

since some time Mozilla Firefox and Thunderbird for Windows come with
a “maintenance service” (running privileged under the SYSTEM account):
<https://support.mozilla.org/en-US/kb/what-mozilla-maintenance-service>

The maintenanceservice_installer.exe (which is extracted into the
resp. installation directory) is executed during the end of the
Firefox/Thunderbird installation when the user has not deselected
the “[x]…