Since your log ends with:
Mar 10 14:11:30 corrado-n4-nn-0310 systemd[1]: run-snapd-ns-firefox.mnt.mount: Unmounting timed out. Terminating.
we'll move it to snapd.
Since your log ends with:
Mar 10 14:11:30 corrado-n4-nn-0310 systemd[1]: run-snapd- ns-firefox. mnt.mount: Unmounting timed out. Terminating.
we'll move it to snapd.