As you know there can be different CSS style sheets for screen and for printing.
Lets take a well known sample: Wikipedia and the following web page:
Forward contract - Wikipedia, the free encyclopedia
I have a Add-On tool like Firebug for Firefox where I can inspect the HTML/CSS code.
However I cannot find the CSS which is responsible for printing.
All the shown CSS definitions I have seen so far are for screen.
How do I track down the CSS code hierarchy to find the print CSS stylesheet?