Comment 7 for bug 2037228

I tested an upgrade from Lunar to Mantic today using ubuntu-release-upgrader version 23.10.7 which changed the snap update process from `snap refresh` to `snap switch` and still encountered this issue.

bdmurray@clean-lunar-amd64:~$ /usr/bin/firefox -h

Command '/usr/bin/firefox' requires the firefox snap to be installed.
Please install it with:

snap install firefox

bdmurray@clean-lunar-amd64:~$ snap info firefox
name: firefox
summary: Mozilla Firefox web browser
publisher: Mozilla\u2713
store-url: https://snapcraft.io/firefox
license: unset
description: |
  Firefox is a powerful, extensible web browser with support for modern web application
  technologies.
commands:
  - firefox
  - firefox.geckodriver
snap-id: 3wdHCAVyZEmYsCMFDE9qt92UV8rC8Wdk
tracking: latest/stable/ubuntu-23.10
refresh-date: today at 09:16 PDT
channels:
  latest/stable: 118.0.1-1 2023-09-28 (3206) 252MB -
  latest/candidate: 118.0.1-1 2023-09-29 (3215) 252MB -
  latest/beta: 119.0b3-1 2023-09-29 (3214) 254MB -
  latest/edge: 120.0a1 2023-09-29 (3213) 274MB -
  esr/stable: 115.3.1esr-1 2023-09-28 (3207) 253MB -
  esr/candidate: 115.3.1esr-1 2023-09-28 (3207) 253MB -
  esr/beta: \u2191
  esr/edge: \u2191
installed: 111.0.1-2 (2517) 253MB -

I then ran snap refresh firefox:

bdmurray@clean-lunar-amd64:~$ snap refresh firefox
firefox (stable/ubuntu-23.10) 118.0-1 from Mozilla\u2713 refreshed

and /usr/bin/firefox worked again.