Quick answerMost big websites have their own settings that make them calmer on a migraine day: turning off autoplay, stopping animated GIFs and switching to a dark theme. Below are the exact menu paths for each site, taken from the sites' own help pages, plus what a browser extension can add on top.
Migraine Mode for Chrome – one switch applies a preset based on published studies to every tab (Alt+Shift+M). Try it 1 hour free, then $3/month.
FAQ
Do these settings sync across devices?
Often not. YouTube, Slack, X and LinkedIn all document that some of these settings are per device or per browser.
Not a medical device and not medical advice. Migraine Mode is a screen-comfort tool: it does not diagnose, treat, cure or prevent migraine or any other condition, and it does not replace a doctor. Its settings are based on studies of light, colour, flicker, patterns and motion; the extension itself has not been clinically tested. When to see a doctor.