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Choose Color

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I just opened a pop up that you sent - asking to choose a color. I had no idea it would change the look of Firefox. Please could you instruct me how to change it back to how it was. This brown is not OK.

I just opened a pop up that you sent - asking to choose a color. I had no idea it would change the look of Firefox. Please could you instruct me how to change it back to how it was. This brown is not OK.

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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) and go back to the theme you were using previously.