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change default background color for pdf viewer

  • 4 پاسخ
  • 1 has this problem
  • 8 views
  • آخرین پاسخ توسّط cor-el

gonzalez1814
gonzalez1814
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Hello,

I updated to macos Monterey yesterday and I guess I guess I also my firefox updated to 102.0.1 (64-bit)... Anyway, I was very much used to have a white background in firefox's built-in pdf viewer when viewing pdfs that really have a white background (for example if you download it and check it with Adobe reader, or any reader other than the viewer built-in the browser).

Now the background color is gray, and it's not convenient for me at all. I could not find the magic setting that allow to changing this behaviour... I do not use themes, so I do not mind changing something there if needed.

Could any guru help here please ? That would be much appreciated.

Hello, I updated to macos Monterey yesterday and I guess I guess I also my firefox updated to 102.0.1 (64-bit)... Anyway, I was very much used to have a white background in firefox's built-in pdf viewer when viewing pdfs that really have a white background (for example if you download it and check it with Adobe reader, or any reader other than the viewer built-in the browser). Now the background color is gray, and it's not convenient for me at all. I could not find the magic setting that allow to changing this behaviour... I do not use themes, so I do not mind changing something there if needed. Could any guru help here please ? That would be much appreciated.
Attached screenshots

All Replies (4)

Chris Ilias
Chris Ilias
  • Moderator
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Hi, I'm not sure about this, but I think the background colour is determined by the PDF file itself. I'm unable to test the file you posted an image of, but when I try my test file at https://ilias.ca/tests/MIDI_400_review.pdf the background is white. Does it display as grey to you?

gonzalez1814
gonzalez1814 Question owner
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Sorry for the late answer. When I tried your file, for me it is displayed in gray, see attachment.

Any suggestion on how to get rid of the gray background and have it displayed as white ?

Thanks a lot for any advice

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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By default Firefox uses these system colors: Canvas and CanvasText.

Related prefs for about:config:

  • pdfjs.pageColorsBackground = Canvas (#FFFFFF)
  • pdfjs.pageColorsForeground = CanvasText (#000000)
cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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See also:

  • 1778068 - PDF Viewer should not set the background of PDF documents to browser.display.background_color (fixed for 104)

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

Modified by cor-el