This container can be pulled via:
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/kiosk/firefox-esr:140.3
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/kiosk/firefox-esr:140.3-64.6
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/kiosk/firefox-esr:esr
  docker pull registry.opensuse.org/home/pushman/bci/cr/sle-15-sp7/containerfile/suse/kiosk/firefox-esr:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.