index.md

---

title: windows.WindowState
slug: Mozilla/Add-ons/WebExtensions/API/windows/WindowState
page-type: webextension-api-type
tags:
  - API
  - Add-ons
  - Extensions
  - Non-standard
  - Reference
  - Type
  - WebExtensions
  - WindowState
  - Windows
browser-compat: webextensions.api.windows.WindowState

---

{{AddonSidebar()}}

The state of this browser window.

Type

Values of this type are strings. Possible values are:

• "normal"

  • : The window is at the default size or user-selected size.

• "minimized"

  • : The window is only visible as an icon in the taskbar or .

• "maximized"

  • : The window fills the screen on which it is displayed not including any screen areas reserved by the operating system.

• "fullscreen"

  • : The window is running as a full screen application or content in a tab is using the Fullscreen API

• "docked"

  • : A docked window occupies a fixed position relative to other windows owned by the same application.

macOS compatibility: Beginning in macOS 10.10, the default maximizing behavior for windows changed to run applications as full screen applications instead of "zoomed" windows. fullscreen refers to both the browser running as a full screen application and when content in a tab uses the Fullscreen API.

Browser compatibility

{{Compat}}

{{WebExtExamples}}

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