sessions.forgetClosedTab()

Removes a closed tab from the browser's list of recently closed tabs. Note that the sites visited by that tab are not removed from the browser's history. Use the browsingData or history APIs to remove history.

This is an asynchronous function that returns a Promise.

Syntax

var forgettingTab = browser.sessions.forgetClosedTab(
  windowId,            // integer
  sessionId            // string
)

Parameters

windowId
Integer. The ID of the window that hosted the tab you want to forget.
sessionId
String. The ID of the session you want to forget.

Return value

A Promise. This will be fulfilled with no arguments when the session has been removed.

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

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
forgetClosedTab
No
No
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No
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Examples

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

function forgetMostRecent(sessionInfos) {
  if (!sessionInfos.length) {
    console.log("No sessions found")
    return;
  }
  let sessionInfo = sessionInfos[0];
  if (sessionInfo.tab) {
    browser.sessions.forgetClosedTab(sessionInfo.tab.windowId, sessionInfo.tab.sessionId);
  } else {
    browser.sessions.forgetClosedWindow(sessionInfo.window.sessionId);
  }
}

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

browser.sessions.getRecentlyClosed({maxResults: 1})
.then(forgetMostRecent, onError);

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/forgetClosedTab