Universal Opt-Out Mechanism Implementation

Overview

A universal opt-out mechanism is a browser or device-level signal that communicates a consumer's privacy preferences to websites and online services. The Global Privacy Control (GPC) is the leading universal opt-out mechanism, supported by major browsers (Firefox, Brave, DuckDuckGo) and browser extensions (Privacy Badger, Disconnect). Multiple US state privacy laws now require businesses to recognize and honor these signals.

GPC is defined in the Global Privacy Control specification (published by the GPC project), transmitted via the Sec-GPC: 1 HTTP header and the navigator.globalPrivacyControl JavaScript API.

State-by-State Requirements