b.storck@linux-system: ~ $ apt policy firefox
firefox:
  Installiert:           60.0+linuxmint3+sylvia
  Installationskandidat: 60.0.1+linuxmint1+sylvia
  Versionstabelle:
     60.0.1+linuxmint1+sylvia 700
        700 http://mirror.bauhuette.fh-aachen.de/linuxmint sylvia/upstream amd64 Packages
     60.0.1+build2-0ubuntu0.16.04.1 500
        500 http://ftp-stud.hs-esslingen.de/ubuntu xenial-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
 *** 60.0+linuxmint3+sylvia 100
        100 /var/lib/dpkg/status
     45.0.2+build1-0ubuntu1 500
        500 http://ftp-stud.hs-esslingen.de/ubuntu xenial/main amd64 Packages
b.storck@linux-system: ~ $