Silent uninstall shows Cleaning Assistant page
Silently uninstalling Firefox ESR 78.7.0 and 78.6.1 with helper.exe /S shows an Installer Dialog page instead of running fully silent. In german the heading in the Installer Dialog Window is "Stattdessen Firefox bereinigen?" (see screenshot). Dont't know the exact translation to the english version. Technically it asks for starting a cleaning assistant.
Any chance to deactivate this with another silent switch? Is it a bug?
Official docs tell me that the /S switch alone should be enough: https://support.mozilla.org/en-US/kb/silently-install-uninstall-firefox-enterprise
Using MSI Package is no option.