Java Plugin Install for Linux

Linux Firefox configuration for Java plugin

1. cd to firefox folder (eg: cd /usr/lib/firefox-3.6)
2. create new folder called 'plugins' (eg: mkdir plugins, use sudo user if you don't have permissions)
3. cd plugins
4. create a symbolic link to java_home/jre/lib/i386/libnpjp2.so (eg: ln -s /usr/java/jdk1.6.0_26/jre/lib/i386 or amd64/libnpjp2.so
5. restart/start the firefox. ...thats it :-) 

Source: http://www.oracle.com/technetwork/java/javase/manual-plugin-install-linux-136395.html