gecko-dev/plugin/oji/JEP

These directories contain the browser plugins to enable Java 1.4.x support on
Mac OS X from a non-Cocoa non-WebKit app. The project has a MPL-compatible
license and the source is hosted on SourceForge.

For more information on the Java Embedding Plugin project, visit:
  
  http://javaplugin.sourceforge.net/

Check JavaEmbeddingPlugin.bundle/Contents/Info.plist to determine which version
of the plug-in is checked in. Contact Steven Michaud (smichaud at pobox.com)
with questions.