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Firefox Dark Mode Options: Dark Reader, NightOwl, and Built-In Settings Compared

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Bright web pages at night can cause eye strain, and Firefox users have several ways to switch to darker displays. Enabling dark mode in the operating system helps sites that support the prefers-color-scheme setting, though sites without dark support stay white. Dark Reader works on virtually any site with extensive customization but can cause visual glitches and uses more CPU. NightOwl offers a lightweight, pure-CSS alternative with fewer glitches but limited per-site control and no effect on sites lacking dark support.

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