Setting the policy to Disabled allows popups targeting _blank to access (via JavaScript) the page that requested to open the popup.
Setting the policy to Enabled or leaving it unset causes the window.opener property to be set to null unless the anchor specifies rel="opener".
This policy will be removed in Google Chrome version 95.
See https://chromestatus.com/feature/6140064063029248.
| Registry Hive | HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Google\Chrome |
| Value Name | TargetBlankImpliesNoOpener |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |