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Compatibility with Big Sur 11.5.2

  • 2 replies
  • 1 has this problem
  • Last reply by FredMcD

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Is anything going to be done about the compatibility issues with Big Sur? I cannot control website preferences, all color has been lost from buttons and menus, regular controls in this browser do not function appropriately. Shall anything be done? How will users know if a fix has been completed? And I saw no answers to the other three submissions requesting help with these Big Sur issues.

And there is no confirming color or check mark when I check the request to receive an email if there IS a response, so how am I to know if it has been effective. (I noticed this same issue on other websites.)

All Replies (2)

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Hello there!

Is it possible if I can see some of the screenshots of your problems?


Kind regards,



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cor-el said

This could be a problem with High Contrast Mode on Mac. See "New" in the release notes. Firefox now automatically enables High Contrast Mode when "Increase Contrast" is checked on MacOS in the Accessibility settings.

Make sure you allow pages to choose their own colors.

  • Settings -> General: Fonts & Colors -> Colors: "Override the colors specified by the page with my selections above"

Try "Never" if the default "Only with High Contrast themes" isn't working.


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