How did you install it, and where did you install it to.
If you installed it to /usr/lib/java, and Firefox is in /usr/lib/firefox, then simply execute the following command as root:
Code:
ln -s /usr/lib/java/jre/plugin/i386/ns610-gcc32/libjavaplugin_oji.so /usr/lib/firefox/plugins
I suggest using "locate libjavaplugin_oji.so" and "locate firefox" to find the exact paths on your system. The above is from mine, so may not be correct for you. You may need to run "updatedb" as root first.
I hope this helps
--Ian