The internet never sleeps, which means you can stare at a brightly lit display at all hours of the day, potentially messing with your sleep and putting strain on your eyes. Turn off the lights by enabling dark mode in your browser.
Many popular mobile apps offer darker color choices, but on the web the color theme is set for each site by the site's developer. Still, you can make it easier to look at the experience by changing the color of the menu pages or playing with specific experimental features. How to do it in Chrome, Firefox, Safari and Edge.