Run Firefox Inside Firefox

How about opening firefox inside firefox which is again in another firefox.
Not bad huh?
Yup you can run firefix inside firefox.
and its really easy too.
Just type in this url in firefox's address bar there you go!!!!
Firefox Inside Firefox !!!!

copy paste following url in web browser (mozilla firefox)

chrome://browser/content/browser.xul

Following is the screenshot of this Hot Trick (firefox in firefox in firefox, which is again in another firefox)