I followed these instructions:
Oracle JDK on FreeBSD
This is the effort of the Java FreeBSD porting project. By the use of patchsets and the JDK source code released by Oracle, this port builds a native JDK for FreeBSD.
make install clean
Seamonkey gave me same result as Firefox - about
lugins does not see java plugin at all. Seamonkey does see the flash plugin. Will the Linux plugin work with the Firefox pbi?