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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