Till Kamppeter @till-kamppeter thank you so much for your help and the really great explanation of the snap System itself, now all is working fine again.
sudo snap install cups cups 2.4.11-3 from OpenPrinting✓ installed ######## snap connections | grep :cups cups-control cups:cups-host :cups-control - cups-control thunderbird:cups-control :cups-control - ######## sudo snap connect firefox:cups-control ######## snap connections | grep :cups cups-control cups:cups-host :cups-control - cups-control firefox:cups-control :cups-control manual cups-control thunderbird:cups-control :cups-control - But the Problem with gnome-control-center is still present. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/2083530 Title: gnome-control-center not able to add printer or make settings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/2083530/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs