Firefox Dark Mode [updated] May 2026

Change website appearance settings in Firefox - Mozilla Support

Firefox dark mode is a feature that transforms the browser's interface and compatible web pages into a high-contrast, low-light color scheme to reduce eye strain. You can enable it through native settings on both desktop and mobile, or use advanced extensions like Dark Reader to force dark mode on every website. firefox dark mode

There are two distinct ways to apply dark mode: changing the browser's interface (tabs and toolbars) and changing the actual web content you view. Change website appearance settings in Firefox - Mozilla