/usr/lib/mozilla/plugins:
  => gecko-mediaplayer-wmp.so
        (size: 106832 bytes, mtime: Sat Aug 20 17:18:17 2011)
  => 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 03:17:59 2012)
  => librhythmbox-itms-detection-plugin.so
        (size: 6048 bytes, mtime: Tue Mar 20 14:18:11 2012)
  => flashplugin-alternative.so
     - symlink to /etc/alternatives/mozilla-flashplugin
     - symlink to /usr/lib/flashplugin-installer/libflashplayer.so
        (size: 18782520 bytes, mtime: Mon Mar 12 22:22:33 2012)
  => gecko-mediaplayer-rm.so
        (size: 106832 bytes, mtime: Sat Aug 20 17:18:17 2011)
  => gecko-mediaplayer-dvx.so
        (size: 106832 bytes, mtime: Sat Aug 20 17:18:17 2011)
  => gecko-mediaplayer.so
        (size: 110928 bytes, mtime: Sat Aug 20 17:18:17 2011)
  => gecko-mediaplayer-qt.so
        (size: 106832 bytes, mtime: Sat Aug 20 17:18:17 2011)

/usr/lib/firefox/plugins:

/usr/lib/xulrunner-addons/plugins: