Private Network Access: introducing preflights - Chrome Developers
March 7, 2022: The experiment in Chrome 98 was rolled back due to stability and compatibility issues discovered in the rollout to Chrome stable. These issues will be fixed before the experiment is tried again, no earlier than in Chrome 101. Learn more in the [email protected] Intent to Ship email thread for more details.
https://developer.chrome.com/blog/private-network-access-preflight/