Migraine Mode is a browser extension for Chrome designed to reduce visual discomfort on computer screens. Its primary function is to apply a single, coordinated set of adjustments across all open browser tabs with one click or a keyboard shortcut (Alt+Shift+M). The extension dims the screen, applies a soft green tint, enables a smart dark mode, reduces contrast, increases line spacing, freezes GIFs, stops autoplay, and disables motion effects like transitions and parallax scrolling. The default settings are based on published studies regarding light sensitivity and migraine, though the extension has not been clinically tested and is not classified as a medical device. Key features include adjustable dimming levels (10%, 25%, or 40%), optional rose and amber tints, per-screen calibration that reads resolution and pixel ratio, and schedules that automate the quiet preset by time of day and weekday. Users can create, rename, and switch between multiple saved presets, as well as set per-site rules to always enable, always disable, or apply a specific preset to individual websites. The side panel displays each setting and references the evidence behind it, with labels indicating the strength of that evidence. The extension works on most standard websites while leaving photos and video colors unchanged. Typical use cases involve users activating Migraine Mode during a migraine episode to quickly reduce visual stimuli, or scheduling it to activate automatically during specific hours to prevent strain. After installation, a one hour free trial allows full access to all features without requiring a credit card. Following the trial, a subscription costs 5 USD per month or 19 USD per year, supporting up to three browsers per account. The extension is compatible with Chrome and requires no additional hardware. Users can cancel their subscription at any time.