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Please explain the problem in detail. What happens? What is/are the exact error message(s) ?

Hello,

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Thank you!

It is possible you selected one of the Colorways themes that are included in Firefox. You can find the built-in themes (light, dark, system) and further down the Colorways themes included in Firefox on the "Add-ons and Themes" page (Ctrl+Shift+A; Themes tab).

• https://support.mozilla.org/en-US/kb/personalize-firefox-colorways
• https://support.mozilla.org/en-US/kb/use-themes-change-look-of-firefox
• https://blog.mozilla.org/en/products/firefox/introducing-new-colorways-for-firefox-94/