User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:53.0) Gecko/20100101 Firefox/53.0 Build ID: 20170509210301 Steps to reproduce: I printed several pages from Firefox. Actual results: First time the print was double sided, next prints were single sided. After making a print from Firefox, the preference print.print_duplex is created in prefs.js with a value of 0. After a first (double-sided) print, this preference is created. The result is the next print is single side. Expected results: The prints should be double sided (set by the printer) all times. Firefox should not overrule the printer settings.
Component: Untriaged → Printing
Product: Firefox → Toolkit
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