Do you run docker container in privileged mode? https://phoenixnap.com/kb/docker-privileged

And do you run nano inside the container?

Docker container running in privileged mode has root permissions to host filesystem and devices (limited by said restrictions).

Yes I love Gnome workflow. Actually so much that if I am forced to use KDE for example, it feels really archaic and slow to use.

You must disallow snap firefox

https://www.debugpoint.com/remove-firefox-snap-ubuntu/