We're looking for a person or people to help audit MDN to find places we could speed up. Is this you or someone you know? Check out the RFP: https://mzl.la/2IHcMiE



Information about a browser window.


Values of this type are objects. They contain the following properties:

boolean. Whether the window is set to be always on top.
boolean. Whether the window is currently the focused window.
integer. The height of the window, including the frame, in pixels.
integer. The ID of the window. Window IDs are unique within a browser session.
boolean. Whether the window is incognito.
integer. The offset of the window from the left edge of the screen in pixels.
string. The session ID used to uniquely identify a Window obtained from the sessions API.
A windows.WindowState value representing the state of this browser window — maximized, minimized, etc.
Array of tabs.Tab objects representing the current tabs in the window.
The title of the browser window. Requires "tabs" permission. Read only.
integer. The offset of the window from the top edge of the screen in pixels.
A windows.WindowType value representing the type of browser window this is — normal browser window, popup, etc.
integer. The width of the window, including the frame, in pixels.

Browser compatibility

ChromeEdgeFirefoxFirefox for AndroidOpera
Basic support Yes Yes45 No Yes
alwaysOnTop19 No45 No15
focused Yes Yes45 No Yes
height Yes Yes45 No Yes
id Yes Yes45 No Yes
incognito Yes Yes145 No Yes
left Yes Yes45 No Yes
sessionId31 No No No18
state Yes Yes45 No Yes
tabs Yes Yes45 No Yes
title No No56 No No
top Yes Yes45 No Yes
type Yes Yes45 No Yes
width Yes Yes45 No Yes

1. Supported as inPrivate.


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: kestrel, wbamberg, chrisdavidmills
 Last updated by: kestrel,