browsingData.removeCookies()

Clears the browser's cookies.

You can use the removalOptions parameter, which is a browsingData.RemovalOptions object, to:

• clear only cookies created after a given time
• control whether to clear cookies only set from normal web pages or to clear cookies set from hosted apps and extensions as well.

This is an asynchronous function that returns a Promise.

removalOptions

object. A browsingData.RemovalOptions object, which may be used to clear only cookies created after a given time, and whether to clear cookies only set from normal web pages or to clear cookies set from hosted apps and extensions as well.

A Promise that will be fulfilled with no arguments when the removal has finished. If any error occurs, the promise will be rejected with an error message.

Remove cookies created in the last week:

function onRemoved() {
  console.log("removed");
}

function onError(error) {
  console.error(error);
}

function weekInMilliseconds() {
  return 1000 * 60 * 60 * 24 * 7;
}

let oneWeekAgo = (new Date()).getTime() - weekInMilliseconds();

browser.browsingData.removeCookies(
  {since: oneWeekAgo}).
then(onRemoved, onError);

Remove all cookies:

function onRemoved() {
  console.log("removed");
}

function onError(error) {
  console.error(error);
}

browser.browsingData.removeCookies({}).
then(onRemoved, onError);