Restores a closed tab or window. Restoring doesn't just reopen the tab or window: it also restores the tab's navigation history so the back/forward buttons will work. Restoring a window will restore all the tabs that the window contained when it was closed.

This is an asynchronous function that returns a Promise.


let restoringSession = browser.sessions.restore(
  sessionId             // string



string. A string containing the session ID for the window or tab to restore. This can be found in the sessionId property of the Tab or Window object in the Session returned from sessions.getRecentlyClosed().

Return value

A Promise. This will be fulfilled with a Session object representing the session that was restored.

Browser compatibility

BCD tables only load in the browser


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

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

function onError(error) {

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

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

Known issues

Bug 1538119 - Duplicate sessionId in browser.sessions.getRecentlyClosed() after "Restore previous session"