Java on Firefox

Yes, I know this was addressed many times, but I couldn't find an answer to my question elsewhere. I had recently looked on the Mozilla site for a manual configuration technique for Java, and found:

Workaround if Java is not detected - Advanced

On most systems, the Java plugin files will be detected via plugin scanning if the
required registry entry exists (see above) and the currently-installed versions of
the Java plugins will appear in the about:plugins listing. There may be some cases
where Java is not detected unless the Java "np.dll" plugin files are copied from
the Java application directory "bin" folder (e.g., from C:\Program
Files\Java\j2re\bin\) to your Mozilla browser's installation directory
plugins folder (e.g., to C:\Program Files\Mozilla Firefox\plugins) [8]. This should
be done only as a last resort, as each time Java is updated the outdated plugin files
must be removed and the newer versions copied over. Important: If copying the Java
plugin files to the browser plugins folder does not activate Java after restarting 
the browser, remove them. 

This was from http://kb.mozillazine.org/Java, about half of the way down the page.

Would this possibly make Java Portable work on Firefox?