This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/kiosk-firefox:151.0
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/kiosk-firefox:151.0-14.176
  docker pull registry.opensuse.org/opensuse/factory/totest/containers/opensuse/kiosk-firefox:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.