Heads-up: Plan to implement "greasing" for Attribution-Reporting-Eligible header

[Akash Nadan]

Hi everyone, We are planning on implementing "greasing" for the Attribution-Reporting-Eligible header in M115. This header is meant to be parsed as a "structured dictionary" for extensibility purposes, and not matched as a literal string. Therefore to ensure that reporting origins are not doing literal string matching, the structured header RFC/spec suggests "greasing" the header, which will include bogus values that may cause breakage if you are not using a real structured header parser. What you need to do? You should update your integrations before M115 to use a real structured header parser in order to avoid any breakage. Please let us know if you have any questions or concerns.

Thanks,

Akash