* The [ ` Window.screen.isExtended ` ](/en-US/docs/Web/API/Screen/isExtended "Window.screen.isExtended") property will always return ` false ` . 

##  Syntax

http

    
    
    Permissions-Policy: window-management=<allowlist>;
    

` <allowlist> `

    

A list of origins for which permission is granted to use the feature. See [ `
Permissions-Policy ` > Syntax ](/en-US/docs/Web/HTTP/Headers/Permissions-
Policy#syntax) for more details.

##  Default policy

The default allowlist for ` window-management ` is ` self ` .

##  Specifications

Specification  
---  
[ Window Management  
#  api-permission-policy-integration  ](https://w3c.github.io/window-
management/#api-permission-policy-integration)  
  
##  Browser compatibility

BCD tables only load in the browser  with JavaScript enabled. Enable
JavaScript to view data.

##  See also

  * [ Window Management API ](/en-US/docs/Web/API/Window_Management_API)
  * [ ` Permissions-Policy ` ](/en-US/docs/Web/HTTP/Headers/Permissions-Policy) header 
  * [ Permissions Policy ](/en-US/docs/Web/HTTP/Permissions_Policy)

##  Help improve MDN

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