/usr/lib/mozilla/plugins:
  => libjavaplugin.so
     - symlink to /etc/alternatives/mozilla-javaplugin.so
     - symlink to /usr/lib/jvm/java-6-openjdk/jre/lib/amd64/IcedTeaPlugin.so
        (size: 200768 bytes, mtime: Wed Sep  8 03:11:53 2010)

/usr/lib/xulrunner-addons/plugins: