Firefox says I don't have java. But I have Java SDK!

Initial web searches say I only have to enable Java in Firefox preferences.
http://www.java.com/en/download/help/enable_browser.xml
That didn't work!

I went on to download JRE from:
http://www.java.com/en/download/windows_manual.jsp
This seems to have worked!

If it still doesn't work, try this:
http://www.java.com/en/download/windows_xpi.jsp

Verify if your java is enabled from here:
http://www.java.com/en/download/installed.jsp
Yup! It definitely works.

Enjoy!