Adjust Screen Brightness is a Firefox extension designed to enhance user comfort by allowing customization of screen brightness levels for different times of the day. The extension helps reduce eye strain while reading online documents by enabling users to set specific brightness values for both daytime and nighttime. Users can choose to maintain a 100% brightness level during the day if preferred, ensuring flexibility in usage.

The tool comes with default settings where daytime starts at 08:00 and nighttime begins at 19:00, but these can be adjusted according to user preferences. This subscription-based application is ideal for those who spend extended periods in front of screens, providing an easy-to-use solution for managing brightness and improving overall viewing comfort.