/usr/lib/mozilla/plugins:
  => libtotem-gmp-plugin.so
        (size: 105424 bytes, mtime: Tue Mar 13 19:34:13 2012)
  => libtotem-cone-plugin.so
        (size: 100720 bytes, mtime: Tue Mar 13 19:34:13 2012)
  => libtotem-mully-plugin.so
        (size: 72040 bytes, mtime: Tue Mar 13 19:34:13 2012)
  => librhythmbox-itms-detection-plugin.so
        (size: 6048 bytes, mtime: Tue Mar 20 13:18:11 2012)
  => libtotem-narrowspace-plugin.so
        (size: 80560 bytes, mtime: Tue Mar 13 19:34:13 2012)
  => libjavaplugin.so
     - symlink to /etc/alternatives/mozilla-javaplugin.so
     - symlink to /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
        (size: 205064 bytes, mtime: Fri Mar  9 02:17:59 2012)
  => flashplugin-alternative.so
     - symlink to /etc/alternatives/mozilla-flashplugin
     - symlink to /usr/lib/flashplugin-installer/libflashplayer.so
        (size: 18782520 bytes, mtime: Mon Mar 26 10:38:57 2012)

/usr/lib/firefox/plugins:

/usr/lib/xulrunner-addons/plugins: