if you ever encounter this problem, you may try this. all you have to do is linking the plugin file [libjavaplugin_oji.so] from the Java JRE plugin’s directory, into the Firefox plugin’s directory.

cd /usr/lib/firefox/plugins
sudo ln -sv /usr/lib/jvm/java-6-sun/jre/plugin/i386/ns7/libjavaplugin_oji.so

restart your Firefox. hope it helps.. :mrgreen: