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Gets information about a contextual identity, given its cookie store ID.

This is an asynchronous function that returns a Promise.


var getContext = browser.contextualIdentities.get(
  cookieStoreId                  // string



string. The ID of this contextual identity's cookie store. Because contextual identities each have their own cookie store, this serves as an identifier for the contextual identity itself.

Return value

A Promise that will be fulfilled with a ContextualIdentity that describes the identity. If the identity could not be found, the promise is fulfilled with null.

Browser compatibility

ChromeEdgeFirefoxFirefox for AndroidOpera
Basic supportNoNo5353No


This example tries to retrieve the contextual identity whose ID is "firefox-container-1":

function onGot(context) {
  if (!context) {
    console.error("Context not found");
  } else {
    console.log(`Name: ${}`);

function onError(e) {

browser.contextualIdentities.get("firefox-container-1").then(onGot, onError);

Document Tags and Contributors

 Contributors to this page: wbamberg
 Last updated by: wbamberg,