/home/wsb/.mozilla/plugins:
  => nppdf.so
        (size: 127292 bytes, mtime: Wed Mar  6 18:57:34 2013)

/usr/lib/mozilla/plugins:
  => librhythmbox-itms-detection-plugin.so
        (size: 6088 bytes, mtime: Sat Apr 13 23:46:31 2013)
  => libnpjp2.so
     - symlink to /etc/alternatives/libnpjp2.so
     - symlink to /usr/lib/jvm/java-7-oracle/jre/lib/amd64/libnpjp2.so
        (size: 204854 bytes, mtime: Fri Apr 19 19:50:43 2013)
  => libgnome-shell-browser-plugin.so
        (size: 18840 bytes, mtime: Sat Apr 27 00:36:13 2013)
  => flashplugin-alternative.so
     - symlink to /etc/alternatives/mozilla-flashplugin
     - symlink to /usr/lib/flashplugin-installer/libflashplayer.so
        (size: 19233136 bytes, mtime: Sun Apr 14 10:59:38 2013)

/usr/lib/firefox/plugins:

/usr/lib/xulrunner-addons/plugins: