java plugin for firefox on Linux

http://java.com/zh_TW/download/help/linux_install.xml

0. check firefox url -- about:plugins.
1. install java from java.com
2. soft link the libnpjp2.so to firefox plugins folder, e.g. /usr/lib/mozilla/plugins.
$ sudo ln -s /usr/local/jre1.6.0_30/lib/i386/libnpjp2.so .
3. restart firefox, and everything's done!!