Comment 17 for bug 1962021

To add to the comment by Alkis, since this is one of the top no-mozilla bugzilla related entries) if you removed snap and this change made it install itself again, the steps to remove it are:

snap remove firefox
snap list #(proceed to remove one by one the remaining packages, in my case)
snap remove gtk-common-themes
snap remove gnome-3-38-2004
snap remove core20
snap remove bare
snap remove snapd
apt remove --purge snapd #(this will purge your firefox data as well make sure to bakup or sync before)