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Firefox keeps changing my printer to non-default printer

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I have 2 printers I use on my computer - a thermal receipt printer and a Xerox laser printer. I set the receipt printer as default, and have had issues in the past with Firefox defaulting back to the Xerox. So I would go into about:config and manually change it to the receipt printer and it would be fine. But I just replaced the computer and using Windows 10 and Firefox 54.0.1. It keeps defaulting back to the Xerox printer. When I set it in about:config, it will stay to the receipt printer until the next time I print to the Xerox, then it defaults back. I have tried everything I can think of. What can I do to force it to stay on the receipt printer, unless I specifically choose Xerox? Thank you.

I have 2 printers I use on my computer - a thermal receipt printer and a Xerox laser printer. I set the receipt printer as default, and have had issues in the past with Firefox defaulting back to the Xerox. So I would go into about:config and manually change it to the receipt printer and it would be fine. But I just replaced the computer and using Windows 10 and Firefox 54.0.1. It keeps defaulting back to the Xerox printer. When I set it in about:config, it will stay to the receipt printer until the next time I print to the Xerox, then it defaults back. I have tried everything I can think of. What can I do to force it to stay on the receipt printer, unless I specifically choose Xerox? Thank you.

Ọ̀nà àbáyọ tí a yàn

The default printer is the last used printer. It seems to work the same in Firefox 54.0 the same as it always has for me.

In about:config if you modify print.save_print_settings from true to false the print_printer Value shouldn't get changed every time you change back and forth between printers.

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Ọ̀nà àbáyọ Tí a Yàn

The default printer is the last used printer. It seems to work the same in Firefox 54.0 the same as it always has for me.

In about:config if you modify print.save_print_settings from true to false the print_printer Value shouldn't get changed every time you change back and forth between printers.

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Thank you, that did it. And I think I had to do that previously on my old computer, but I forgot about that step.