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Firefox Custom theme

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how do i start creating my own custom theme using css? im not looking to just change a color, i want more control of the whole firefox browser. any links for good tutorials? all ive found was tutorials on how to install custom themes but none on how to make them using css. <3

how do i start creating my own custom theme using css? im not looking to just change a color, i want more control of the whole firefox browser. any links for good tutorials? all ive found was tutorials on how to install custom themes but none on how to make them using css. <3

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WARNING from the moderator team: userChrome.css scripts are not provided by Mozilla and is not officially supported. Firefox is a work in progress and, to allow for continuous innovation, Mozilla cannot guarantee future updates won’t impact your customizations. For this reason, Mozilla does not officially support style rules customization.

Please read Firefox Advanced Customization and Configuration Options to learn more.

If you want to make a custom theme, I recommend that you head to https://color.firefox.com/

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Here are some links. I have added a blank space to each of the external links so you will have to remove those.

https://www.userchrome. org/how-create-userchrome-css.html (see various pages on that site) https://www.reddit. com/r/FirefoxCSS/wiki/index/tutorials https://developer.mozilla.org/en-US/docs/Tools https://developer.mozilla.org/en-US/docs/Web/CSS https://developer.mozilla.org/en-US/docs/Tools/Browser_Toolbox https://developer.mozilla.org/docs/Web/CSS/CSS_Selectors