Aggiorno Firefox e mi tremano le ginocchia


$ apt-cache policy iceweasel
iceweasel:
  Installed: 5.0-6
  Candidate: 6.0-2
  Version table:
     7.0~b1-2 0
        300 http://ftp.it.debian.org/debian/ experimental/main amd64 Packages
     6.0-2 0
        500 http://ftp.it.debian.org/debian/ sid/main amd64 Packages
 *** 5.0-6 0
        200 http://ftp.it.debian.org/debian/ testing/main amd64 Packages
        100 /var/lib/dpkg/status
     3.5.16-6 0
        100 http://ftp.it.debian.org/debian/ stable/main amd64 Packages

Ordunque. Cosa è questo macello?