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 or the contextual identities feature is not enabled, the promise is rejected.

Browser compatibility

ChromeEdgeFirefoxFirefox for AndroidOpera
Basic support No No531 2531 2 No

1. Before version 57, this method resolves its promise with false if the contextual identities feature is disabled.

2. Before version 57, this method resolves its promise with null if the given identity was not found.


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,