Hello Felipe, it looks like you may have changed /etc/apparmor.d/usr.bin.firefox causing the automatic updates to fail.
Running this in a terminal will probably fix things: sudo apt update sudo apt install -f sudo apt upgrade Thanks ** Information type changed from Private Security to Public Security ** Changed in: firefox (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882380 Title: package firefox 77.0.1+build1-0ubuntu0.20.04.1 failed to install/upgrade: fim de ficheiro em stdin na prompt do ficheiro de configuração To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1882380/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs