Dark Mode, Light Displays and Ergonomic Gaming

If the given platform has dark mode active, then the difference between the browser chrome and the walls of the room becomes less noticeable. It probably makes sense to sync it with the operating system so that it is not so bright in the evenings.

The theme of some canvases may not respect your preferences at all: for example, it may turn out to be bright red. In this case, it makes sense to reduce the brightness of the screen rather than sacrifice the contrast of the canvas.

Every two hours, look into the distance to prevent eye strain. A browser game can be tricky to escape since you may be too absorbed in the gameplay.

Set up a reminder to look around every twenty minutes, or alternate game sessions with short breaks to stretch your legs.

If you start to perceive pulsations in the game, this means that it is time to go to the menu and reduce the overall animation. There may be an option in the game settings that allows you to turn off the annoying flickering.

Alternatively, you can enable the system feature that says that you do not want to perceive any changes in motion. Browsers sometimes respect this setting, but game engines often do not. However, one can always try to replace blinking advertisements with a static image.