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Updates the properties of a window. Use this to move, resize, and (un)focus a window, etc.

This is an asynchronous function that returns a Promise.


var updating = browser.windows.update(
  windowId,              // integer
  updateInfo             // object


integer. ID of the window to update.
object. Object containing the properties to update.
drawAttention Optional
boolean. If true, causes the window to be displayed in a manner that draws the user's attention to the window, without changing the focused window. The effect lasts until the user changes focus to the window. This option has no effect if the window already has focus. Set to false to cancel a previous drawAttention request.
focused Optional
boolean. If true, brings the window to the front. If false, brings the next window in the z-order to the front.
height Optional
integer. The height to resize the window to in pixels. This value is ignored for panels.
left Optional
integer. The offset from the left edge of the screen to move the window to in pixels. This value is ignored for panels.
state Optional
windows.WindowState. The new state of the window. The minimized, maximized and fullscreen states cannot be combined with left, top, width or height.
titlePreface Optional
string. Use this to add a string to the beginning of the browser window's title. Depending on the underlying operating system, this might not work on browser windows that don't have a title (such as about:blank in Firefox).
top Optional
integer. The offset from the top edge of the screen to move the window to in pixels. This value is ignored for panels.
width Optional
integer. The width to resize the window to in pixels. This value is ignored for panels.

Return value

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

Browser compatibility

ChromeEdgeFirefoxFirefox for AndroidOpera
Basic support Yes1445 No Yes
drawAttention Yes No45 No Yes
focused Yes1445 No Yes
height Yes1445 No Yes
left Yes No45 No Yes
state Yes1445 No Yes
titlePreface No No56 No No
top Yes No45 No Yes
width Yes1445 No Yes


When the user clicks a browser action's icon, move the window to the top left corner:

function onUpdated(windowInfo) {
  console.log(`Updated window: ${windowInfo.id}`);

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

browser.browserAction.onClicked.addListener((tab) => {

  var updating = browser.windows.update(tab.windowId, {
    left: 0,
    top: 0
  updating.then(onUpdated, onError);


Example extensions


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

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

Contributors to this page: Brettz9, kernp, wbamberg, Makyen, chrisdavidmills
Last updated by: Brettz9,