Comment 2 for bug 1163503

If it is helpful to say so, in my experience Firefox never fully minimizes. I could not reproduce this with any other programs.

Additionally I experienced this while using the LiveCD (or LiveDVD if you prefer), with the following information.

ubuntu@ubuntu:~$ apt-cache policy unity
unity:
  Installed: 7.0.0daily13.04.18~13.04-0ubuntu1
  Candidate: 7.0.0daily13.04.18~13.04-0ubuntu1
  Version table:
 *** 7.0.0daily13.04.18~13.04-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ raring/main amd64 Packages
        100 /var/lib/dpkg/status

ubuntu@ubuntu:~$ apt-cache policy firefox
firefox:
  Installed: 20.0+build1-0ubuntu2
  Candidate: 20.0+build1-0ubuntu2
  Version table:
 *** 20.0+build1-0ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ raring/main amd64 Packages
        100 /var/lib/dpkg/status

ubuntu@ubuntu:~$ apt-cache policy firefox-globalmenu
firefox-globalmenu:
  Installed: 20.0+build1-0ubuntu2
  Candidate: 20.0+build1-0ubuntu2
  Version table:
 *** 20.0+build1-0ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ raring/main amd64 Packages
        100 /var/lib/dpkg/status