Does Firefox have a night mode?

Yes, Firefox has a night mode that can make the web pages darker and easier on the eyes.

There are two ways to enable night mode in Firefox:

• You can use the built-in Dark Theme that changes the appearance of the browser’s toolbar, menu, and tabs. To enable the Dark theme, click the menu button (three horizontal lines) in the top right > Add-ons and themes > Themes > Enable.
• Use Dark Mode Extension: To install it, go to the Firefox Add-ons website and click the “Add to Firefox” button. You can then toggle the dark mode on and off by clicking the extension icon in the toolbar.