Does geckoFx support @media print? When I send windows.print() from my URL it prints like a normal windows.print() without the scss format and the URL.
Im using Geckofx45.
So my problem was that Geckofx was printing header and footer by default. If anyone ever comes into the same problem try this:
GeckoPreferences.User["print.print_footerright"] = "";
You can find the rest on your own about:config or http://kb.mozillazine.org/About:config_entries .