I just tested a focal->jammy upgrade in a regular Ubuntu VM, and this resulted in the same problem: the firefox deb being removed, seemingly because the snap was installed.
As a result, the firefox favourite icon disappeared entirely from the gnome shell dock. This is definitely unwanted behaviour.
I just tested a focal->jammy upgrade in a regular Ubuntu VM, and this resulted in the same problem: the firefox deb being removed, seemingly because the snap was installed.
As a result, the firefox favourite icon disappeared entirely from the gnome shell dock. This is definitely unwanted behaviour.