navigator.globalPrivacyControl is a read-only Boolean that returns the user’s Global Privacy Control (GPC) preference (MDN). It mirrors the Sec-GPC HTTP header.
Read the notes below before you rely on this property. Prefer feature detection when support is limited.
Use navigator.globalPrivacyControl. Start with this line.
navigator.globalPrivacyControl| Call | What it does |
|---|---|
navigator.globalPrivacyControl | Primary signature. |
Built into the browser. Read navigator.globalPrivacyControl on Navigator — no import required.
navigator.globalPrivacyControl| Parameter | Description |
|---|---|
| Feature detect | Required. Property may be missing |
| Return Value | Description |
|---|---|
| * | true | false |
Check whether globalPrivacyControl exists before reading it.
const supported = "globalPrivacyControl" in navigator;
console.log(supported ? "GPC available" : "GPC missing");in. Tests for the property without reading a value.MDN-style log of the current GPC preference.
if (!("globalPrivacyControl" in navigator)) {
console.log("unsupported");
} else {
console.log(navigator.globalPrivacyControl);
// true if user does not want data sold/shared; otherwise false
}true or false.false can mean unset, not “sold.”Sec-GPC header.Branch privacy behavior when the user opts out of sell/share.
function shouldLimitSharing() {
if (!("globalPrivacyControl" in navigator)) return false;
return navigator.globalPrivacyControl === true;
}
console.log(
shouldLimitSharing()
? "honor do-not-sell/share"
: "no GPC opt-out signal"
);false when unsupported.true. Only then treat as an opt-out.Navigator.globalPrivacyControl is Experimental and Limited availability (not Baseline) on MDN. It reflects the same preference as the Sec-GPC header.
Native support is strongest in Firefox 120+ (and Firefox for Android 122+). Chrome, Edge, and Safari typically omit the property. Always feature-detect.
Bottom line: Detect GPC, honor true as do-not-sell/share, and keep a solid consent fallback when the API is missing.
Learn the navigator.gpu entry point for WebGPU.
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