====== Post-Installation ======
===== Firefox =====
Echtes apt statt snap-Paket

  echo '
  Package: *
  Pin: release o=LP-PPA-mozillateam
  Pin-Priority: 1001
  ' | sudo tee /etc/apt/preferences.d/mozilla-firefox
  snap remove firefox
  echo 'Unattended-Upgrade::Allowed-Origins:: "LP-PPA-mozillateam:${distro_codename}";' | sudo tee /etc/apt/apt.conf.d/51unattended-upgrades-firefox
  apt install firefox