/usr/lib/mozilla/plugins:
  => libpipelight-silverlight5.1.so
     - symlink to /usr/lib/pipelight/libpipelight-silverlight5.1.so
        (size: 399936 bytes, mtime: Tue Apr 15 13:10:13 2014)
  => librhythmbox-itms-detection-plugin.so
        (size: 6096 bytes, mtime: Thu Apr  3 21:56:46 2014)
  => libgnome-shell-browser-plugin.so
        (size: 18872 bytes, mtime: Wed Apr  2 07:27:20 2014)
  => libjavaplugin.so
     - symlink to /etc/alternatives/mozilla-javaplugin.so
     - symlink to /usr/lib/jvm/java-7-oracle/jre/lib/amd64/libnpjp2.so
        (size: 216225 bytes, mtime: Mon Apr 14 11:33:21 2014)
  => flashplugin-alternative.so
     - symlink to /etc/alternatives/mozilla-flashplugin
     - symlink to /usr/lib/adobe-flashplugin/libflashplayer.so
        (size: 19234160 bytes, mtime: Tue Mar 25 18:00:55 2014)

/usr/lib/firefox/plugins:

/usr/lib/xulrunner-addons/plugins: