/usr/lib/mozilla/plugins:
  => libtotem-gmp-plugin.so
        (size: 100232 bytes, mtime: Mon Feb  6 11:54:29 2012)
  => librhythmbox-itms-detection-plugin.so
        (size: 5412 bytes, mtime: Wed Jan 18 09:15:49 2012)
  => libtotem-mully-plugin.so
        (size: 71204 bytes, mtime: Mon Feb  6 11:54:29 2012)
  => libtotem-narrowspace-plugin.so
        (size: 79564 bytes, mtime: Mon Feb  6 11:54:29 2012)
  => libtotem-cone-plugin.so
        (size: 95760 bytes, mtime: Mon Feb  6 11:54:29 2012)

/usr/lib/firefox/plugins:

/usr/lib/xulrunner-addons/plugins: