Returns an array of Session objects, representing windows and tabs that were closed in the current browsing session (that is: the time since the browser was started).

This is an asynchronous function that returns a Promise.


var gettingSessions = browser.sessions.getRecentlyClosed(
  filter             // optional object


object. A sessions.Filter object that limits the set of sessions returned.

Return value

A Promise. This will be fulfilled with an array of Session objects, one for each of the most recently closed tabs or windows in the current browsing session, up to sessions.MAX_SESSION_RESULTS or the number included in the filter argument, whichever is smaller. The array is given in the reverse of the order in which tabs or windows were closed, so the most recently closed will be at index 0.

If an error occurs, the promise will be rejected with an error message.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxOperaSafariFirefox for Android
getRecentlyClosedChrome Full support YesEdge Full support 79Firefox Full support 52Opera Full support YesSafari No support NoFirefox Android No support No


Full support  
Full support
No support  
No support


This code restores the single most recently-closed session, whether it's a tab or a window:

function restoreMostRecent(sessionInfos) {
  if (!sessionInfos.length) {
    console.log("No sessions found")
  let sessionInfo = sessionInfos[0];
  if ( {
  } else {

function onError(error) {

browser.browserAction.onClicked.addListener(function() {
  var gettingSessions = browser.sessions.getRecentlyClosed({
    maxResults: 1
  gettingSessions.then(restoreMostRecent, onError);

This API is based on Chromium's chrome.sessions API.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.