Pages may no longer use the API to open a new page during its unload. The popup blocker already prohibits this, but now it is prohibited whether or not the popup blocker is enabled. Enterprises used to be able to use the AllowPopupsDuringPageUnload policy flag to allow popups during unload. We removed this flag in Chrome 88.


Established standard

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 80
  • Chrome for Android release 80

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Positive
  • Positive
  • Shipped/Shipping
  • No signals


Last updated on 2021-04-21