Remove the URL's from printouts when printing a document with Mozilla/Firefox and Plone

By default, when printing a document with either the Mozilla or Firefox browser, links within the content are expanded and printed in the article content in your printout. In order to remove this feature (site-wide!), drop into the ZMI and navigate to the /portal_skins/plone_styles folder and [Customize] plonePrint.css. Next, find the following line:

   #content a:link:after,
   #content a:visited:after {
       content: " [" attr(href) "] ";
   }

Replace line #3 with the following:

    content: ""; 

Your code should now look like this:

    #content a:link:after,
    #content a:visited:after {
        content: "";
    }

That's it. Pretty simple when you know where to look.