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Firefox prints extra blank page when printing from built-in PDF viewer

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Hello, as stated in the title, in the recent Firefox updates 3 of my computers started to print an extra page when printing a PDF document from the built-in PDF document viewer. For instance if I open a PDF containing a single page invoice from GMail and then print it using the print dialog in Firefox's PDF viewer, I will get the second blank page displayed in the print preview, even though the document clearly only contains one page. If I use the option to use the Windows print dialog menu instead, and I print with that, the document will be printed correctly and only one page will be dispensed. This is A4 format, nothing was changed and all computers started to have this symptom after some recent Firefox update. This happens in two separate buildings both on two computers with Windows 10 and one computer with Windows 7, also two completely separate printers, one being a network laser printer and other standard USB inkjet. This doesn't make much sense to me, is there any solution to this? I have switched from the built-in PDF viewer to Acrobat Reader directly, but it was much more convinient to just have a PDF displayed in a Firefox tab rather than opening a separate program to display and print. Of course Acrobat Reader prints just as correctly as the windows dialog. The problem seems to be purely to do with the Firefox PDF viewer.

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This sounds like https://bugzilla.mozilla.org/show_bug.cgi?id=1689789 in which case this should be fixed in Firefox 86 when it releases in a couple of weeks. Sorry for the inconvenience there.