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Printer setting claims scaling issue and refuse to print when changing between label printer and A4 printer

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I have a SATO label printer and a Brother A4 printer connected via USB to a Mac running firefox and not much more. The issue only appears when I go from printing a label to printing a A4 pdf page. If I have printed a label and try to print a page on the other printer I get an issue that report thats "Unvalid page size" (translated from swedish) "please change scale to paper size to print". I have all scale options selected. Try to print A4, if I under layout change from "Recommended: A4" to "A4" or the other way it prints. Then I can print however much I want until I print a label. I have tried all steps in this guide: https://support.mozilla.org/en-US/kb/fix-printing-problems-firefox but it did not help. Tried it in Chrome, works (but I have to use system dialog for the label printer.)

Does anyone have any recommendations for next steps?

I have a SATO label printer and a Brother A4 printer connected via USB to a Mac running firefox and not much more. The issue only appears when I go from printing a label to printing a A4 pdf page. If I have printed a label and try to print a page on the other printer I get an issue that report thats "Unvalid page size" (translated from swedish) "please change scale to paper size to print". I have all scale options selected. Try to print A4, if I under layout change from "Recommended: A4" to "A4" or the other way it prints. Then I can print however much I want until I print a label. I have tried all steps in this guide: https://support.mozilla.org/en-US/kb/fix-printing-problems-firefox but it did not help. Tried it in Chrome, works (but I have to use system dialog for the label printer.) Does anyone have any recommendations for next steps?