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Duplex printing not available on default Firefox profile

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I have a Brother MFC-J53330DW printer, and cannot get the duplex printing feature to work on my computer since installing and selecting Firefox to be my default browser. It is a similar problem others have had in the past, and no solutions have come up that worked. I can print double-side/duplex in other browsers, and this feature used to work with firefox in the past. I updated the Brother drivers. Is there anyone who knows how to fix this issue? It seems like others have commented on it happening with other Brother printers with Firefox.

If you reference this question (Duplex printing not available on default Firefox profile) and others on the support site, the option does not show up in the print menu, or if using the system dialogue. Please help!

I have a Brother MFC-J53330DW printer, and cannot get the duplex printing feature to work on my computer since installing and selecting Firefox to be my default browser. It is a similar problem others have had in the past, and no solutions have come up that worked. I can print double-side/duplex in other browsers, and this feature used to work with firefox in the past. I updated the Brother drivers. Is there anyone who knows how to fix this issue? It seems like others have commented on it happening with other Brother printers with Firefox. If you reference this question (Duplex printing not available on default Firefox profile) and others on the support site, the option does not show up in the print menu, or if using the system dialogue. Please help!

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Those settings comes from the printer driver software not from Firefox so unless there was install printer driver issue Firefox can only see what is given it. And did you also try Firefox Private Mode browser to verify it's not a Addon caused issue.

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It does not help to try the private mode, and i have updated the printer driver software. My printer used to have the option for duplex printing listed in the menu, until I installed and made Firefox my default browser. I haven't been able to find anyone who has a workable solution.