I changed the page setting parameters on the print preview page. When I pressed apply the screen changed to "preparing,,," and froze. Now nothing will print but the small title header across the top. When I try to go into print preview to change it, the program dumps my selection and I go back to the home screen in the e-mail. I have tested my printer in other programs and its working fine.
Please see this - https://support.mozilla.org/en-US/kb/fix-printing-problems-firefox#w_reset-firefox-printer-setting - to learn how to reset printer settings preferences.