Allows a page to perform synchronous XHR requests during page dismissal.
Supported on: Microsoft Windows 7 or later
Registry
HKLM
Software\Policies\Google\Chrome HKCU
Software\Policies\Google\Chrome Value name: AllowSyncXHRInPageDismissal
Enabled: AllowSyncXHRInPageDismissal = 1
Disabled: AllowSyncXHRInPageDismissal = 0
Description
This policy is removed. It is not compatible with this version of Google Chrome. Read more at https://support.google.com/chrome/a/answer/7643500