Joke aside, looks like your screen brightness is too high to begin with. If it’s set correctly, a light mode tab in an otherwise dark UI should be a mild disruption, not something that blinds you.
Legitimate suggestion: get into the habit of controlling the screen brightness and your eyes will thank you. There are DDC utils that let you control the hardware brightness (and other parameters too) of the monitor via software. I for example like ClickMonitorDDC (works well even if it’s practically abandonware), you can do things like scheduling based on time of day and controlling multiple monitors simultaneously.