Gets details about a window, given its ID. The details are passed into a callback.

This is an asynchronous function that returns a Promise.


let getting =
  windowId,              // integer
  getInfo                // optional object



integer. The ID of the window object you want returned.

getInfo Optional

object. Contains options to filter the type of window.

populate Optional

boolean. If true, the windows.Window object will have a tabs property that contains a list of tabs.Tab objects representing the tabs open in the window. The Tab objects only contain the url, title and favIconUrl properties if the extension's manifest file includes the "tabs" permission or a matching host permission.

windowTypes Optional

array of windows.WindowType objects. If set, the windows.Window returned will be filtered based on its type. If unset the default filter is set to ['normal', 'panel', 'popup'], with 'panel' window types limited to the extension's own windows.

Note: If supplied, the windowTypes component of getInfo is ignored. The use of windowTypes has been deprecated as of Firefox 62.

Return value

A Promise that will be fulfilled with a windows.Window object containing the details of the window. If any error occurs, the promise will be rejected with an error message.

Browser compatibility

BCD tables only load in the browser


This example gets the current window and logs the URLs of the tabs it contains. Note that you'll need the "tabs" permission or matching host permissions to access tab URLs.

Note: This example is a bit unrealistic: in this situation you would more probably use windows.getCurrent().

function logTabs(windowInfo) {
  for (const tabInfo of windowInfo.tabs) {

function onError(error) {
  console.error(`Error: ${error}`);

browser.browserAction.onClicked.addListener((tab) => {, { populate: true }).then(logTabs, onError);

Note: This API is based on Chromium's API. This documentation is derived from windows.json in the Chromium code.