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is there a built in theme that darkens the new tab page, firefox home page, options page basically all white backgrounds?

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previously used ft deepdark for firefox which made all of my backgrounds dark. i can't tolerate the white backgrounds due to a visual condition. i've spent hours looking and trying themes that are not "complete" Has there been a theme designed that does what i need?

previously used ft deepdark for firefox which made all of my backgrounds dark. i can't tolerate the white backgrounds due to a visual condition. i've spent hours looking and trying themes that are not "complete" Has there been a theme designed that does what i need?

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Hi, you need to use userContent.css for that -

https://www.reddit.com/r/firefox/comments/7cwojt/firefox_57_is_nice_but_still_no_dark_background/

https://www.reddit.com/r/firefox/comments/79sx4p/new_tab_color/


Alternatively, there are several add-ons, such as https://addons.mozilla.org/en-US/firefox/addon/new-tab-tools/

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