Firefox Sun Java Plugin is not showing up in Firefox

I have installed the following packages from Ubuntu Lucid Partner Repos:

- sun-java6-bin
- sun-java6-jre
- sun-java6-plugin

Java has successful installed, there menu entries such as the Java Control Panel is accessable.

However, if you load up Firefox 3.6, Java is not featured in the Firefox plugin's list. The plugin's list contains:

- DivX Web Player
- iTunes Application Detector
- QuickTime Plugin
- Shockwave Flash
- VLC Multimedia Plugin
- Windows Media Player Plugin

ProblemType: Bug
Architecture: i386
Date: Thu Mar 18 08:49:05 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/lib/jvm/java-6-sun-1.6.0.18/jre/bin/java
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: nvidia
Package: sun-java6-bin 6.18-2
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
SourcePackage: sun-java6
Uname: Linux 2.6.32-16-generic i686