Global Privacy Control (GPC)
To enable the GPC signal, consumers download a browser or extension that supports the signal. Similar to managing an ad-block extension, consumers can turn on the GPC signal for all websites they visit. If a website supports recognizing GPC, it can register the browser request to Opt Out of Selling or Sharing Personal Info.
To check if GPC is enabled for your browser, visit https://globalprivacycontrol.org/. The site will check whether the GPC signal is detected.
TrustArc · Consent Manager — Global Privacy Control (GPC) · www.trustarc.com