A tab-under is when a page both opens a popup to some destination (usually where the user wants to go) AND navigates the opener page to some third party content (usually an advertisement). Chrome will block these navigations and show native UI to the user so they can follow the redirect just in case.

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

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

  • No signal
  • No signal
  • No signals


Last updated on 2020-11-09