This is a simple Firefox WebExtension that allows you to automatically switch between your themes based on the current time. Set Firefox to change the UI to a dark theme during the night and change back to a light theme during the day! Automatically calculate and set sunrise/sunset times based on your geolocation, manually set the sunrise and sunset times, or change themes based on your OS system theme. For support, suggestions or feedback, please do not hesitate to send me a email (listed as Support Email) or file an issue on Github (requires Github account). Thanks! If this extension helps you, please leave a rating and/or review!