I'd like to make a small change to the definition of "first-party" that we use for third-party cookie blocking: we currently look only at the top-level origin to determine the first-party origin for a request. I'd like to start walking the whole ancestor chain of a frame.


Editor's draft

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 45
  • Chrome for Android release 45
  • Android WebView release 45

Consensus & Standardization

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

  • Shipped/Shipping
  • No signal
  • No signal
  • Positive


Last updated on 2020-11-09