firefox:
  Installed: 54.0+build3-0ubuntu0.16.04.1
  Candidate: 56.0+build6-0ubuntu0.16.04.2
  Version table:
     56.0+build6-0ubuntu0.16.04.2 500
        500 http://is.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
 *** 54.0+build3-0ubuntu0.16.04.1 100
        100 /var/lib/dpkg/status
     45.0.2+build1-0ubuntu1 500
        500 http://is.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
hroi@ht-stream:~$