The get() method of the cookies API retrieves information about a single cookie, given its name and URL.

If more than one cookie with the same name exists for a given URL, the one with the longest path will be returned. For cookies with the same path length, the cookie with the earliest creation time will be returned. If no matching cookie could be found, null is returned.

This is an asynchronous function that returns a Promise.


let getting = browser.cookies.get(
  details                // object



An object containing details that can be used to match a cookie to be retrieved. It can include the following properties:

firstPartyDomain Optional

A string representing the first-party domain with which the cookie to retrieve is associated. This property must be supplied if the browser has first-party isolation enabled. See First-party isolation.


A string representing the name of the cookie to retrieve.

partitionKey Optional

An object representing the storage partition containing the cookie. Include this object with topLevelSite to obtain a cookie from partitioned storage. Otherwise, returns the cookie from unpartitioned storage. This object contains:

topLevelSite Optional

A string representing the first-party URL of the top-level site storage partition containing the cookie.

storeId Optional

A string representing the ID of the cookie store in which to look for the cookie (as returned by cookies.getAllCookieStores()). By default, the current execution context's cookie store will be used.


A string representing the URL with which the cookie to retrieve is associated. This argument may be a full URL, in which case any data following the URL path (e.g. the query string) is ignored. If host permissions for this URL are not specified in the extension's manifest file, the API call will fail.

Return value

A Promise that will be fulfilled with a Cookie object containing details about the cookie, or null if the cookie was not found.

Browser compatibility

BCD tables only load in the browser


This example tries to get the cookie named "favorite-color", associated with the URL for the currently active tab:

function logCookie(cookie) {
  if (cookie) {

function getCookie(tabs) {
  let getting = browser.cookies.get({
    url: tabs[0].url,
    name: "favorite-color",

let getActive = browser.tabs.query({
  active: true,
  currentWindow: true,

Example extensions

Note: This API is based on Chromium's chrome.cookies API. This documentation is derived from cookies.json in the Chromium code.