Some have reported this at https://askubuntu.com/questions/1232868 /problem-installing-deb-in-software-install-ubuntu-20-04
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1908469 Title: Cannot install .deb packages opened from Firefox To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1908469/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
