When printing anything off the internet it shrinks the full page into one forth of the full page. How can i print using the enitre page?

Every time I use firefox I can't print full pages off the internet. I will find the page I want, for example, map quest. I push the print button and my printer prints the entire page in one forth of the space. The entire page I printed can be found in the upper left hand corner of the full page, just shrunk down to a fourth of its size. How can i get a full page printed from the internet? == This happened == Every time Firefox opened