Customize your Firefox browser

Firefox themes let you change your browser’s appearance. They set the color scheme for browser menus and Firefox system pages, and can even add a background image to your Firefox toolbar.

Firefox comes with a default system theme and is preloaded with light, dark and colorful variations.

Image of the default themes that come with Firefox, showing light, dark and colorful variations.

You can find more free custom themes at addons.mozilla.org. Browse the top-rated, trending and most recommended themes. Or look for themes by category, including music, seasonal, sports, and nature. Tailor your experience to your tastes. Cute critters, evil robots, beautiful landscapes — there are thousands of options to make Firefox your own.

Image of three custom Firefox themes: a dark purple and pink theme with white and orange accents, a light beige theme featuring a watercolor painting of birds and cherry blossoms, and a dark black and green theme featuring a high-tech circuitry pattern.

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