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sessions.restore()

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.

Syntax

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

Parameters

sessionId

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

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
restore Yes 79 52 ? Yes No ? ? No ? No ?

Examples

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")
    return;
  }
  let sessionInfo = sessionInfos[0];
  if (sessionInfo.tab) {
    browser.sessions.restore(sessionInfo.tab.sessionId);
  } else {
    browser.sessions.restore(sessionInfo.window.sessionId);
  }
}

function onError(error) {
  console.log(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"

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https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/restore