cv@i5:/opt/java/32/jdk1.6.0_32/jre/lib/i386$ sudo apt-cache policy firefox
firefox:
  Installiert: 12.0+build1-0ubuntu0.12.04.1
  Kandidat:    12.0+build1-0ubuntu0.12.04.1
  Versionstabelle:
 *** 12.0+build1-0ubuntu0.12.04.1 0
        500 http://de.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
        100 /var/lib/dpkg/status
     11.0+build1-0ubuntu4 0
        500 http://de.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages