Today I found some interesting hack about Mozilla/Firefox. I am in need of java in my Ubuntu machine. I have installed java, but I am not able to see any java related sites in my browser So when I have started searching for related topics, I found my answer how to check java is configured in your browser or not. I came to know about Firefox hidden “about protocol”. Though my browser is showing java enabled, but I am not able to see java content of site. The solution for this is to check whether java is configured properly to your browser or not.

So how to check whether java is configured or not?
Ans :
Just open new tab in firefox and type about:plugins. This should show all
the plug-in’s installed in your browser.
If you didn’t find java. Then follow the below link for how to install and test it for your machine.
http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox

And When I tweaked some more I have realized we can do much with this Firefox about protocol.
Though below things are not that much useful, but it's fun to see them
Type below about commands in your Firefox and see yourself what info you can find with Firefox. My favorite one is about:robots
about:
about:blank
about:buildconfig
about:cache
about:cache-entry
about:config
about:crashes
about:credit's
about:license
about:mozilla
about:plugins
about:rights
about:rights#webservices
about:robots
about:support