ADMX Guide

Do not set window.opener for links targeting _blank (obsolete)

Category

Computer Configuration > Administrative Templates > Microsoft Edge

Scope

Both

Registry Key

HKLM\Software\Policies\Microsoft\Edge

Description

OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 102. If you enable this policy or leave it unset, the window.opener property is set to null unless the anchor specifies rel="opener". If you disable this policy, popups that target _blank are permitted to access (via JavaScript) the page that requested to open the popup.