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changing colour on home page

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recently you updated Firefox and it asked me my favourite colour. Now everything is shades of red. How do I return things to how they were before?

recently you updated Firefox and it asked me my favourite colour. Now everything is shades of red. How do I return things to how they were before?

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You can disable your current theme to return to the "System" theme, or select and enable a different one. Best place to start is the Add-ons page, Themes list. This article has more information:

Use themes to change the look of Firefox

Can you find one you like?