If you cannot see any content on pages you printed or in print preview, the cause might be margins which are set too high. #In order to check the margins, we need to go to ''File'' > ''Page Setup''. #Once this is done, switch to the ''Margins & Header/Footer'' tab. #Check what's set there under ''Margins''. The following are the default values for ''Margins'': '''Right''': 12.7 '''Top''': 12.7 '''Left''': 12.7 '''Bottom''': 12.7 Check these values accordingly and change them if necessary.

See this: https://support.mozilla.com/en-US/kb/Page+Zoom