

The browser will remember your theme and won't adjust it any more.


If you don't like the new behavior of Firefox, which applies the appropriate theme (Light or Dark) that matches the system app theme in Windows 10, you can always change the browser's theme manually. If you set the 'Dark' theme as your system and app theme in Windows 10, Firefox will automatically apply the built-in Dark theme, and vice versa. The engine renders web pages much faster than it ever did in the Gecko era.įirefox 63 follows the system app theme. The user interface of the app is more responsive and it also starts up noticeably faster. Thanks to the changes made to the engine and the UI, the browser is amazingly fast.
