Sec-CH-UA Client Hints

The set of Sec-CH-UA-* client hints aims to deprecate and replace the User-Agent header in order to reduce the passive fingerprinting surface we expose via HTTP requests.

Demo

Documentation

Specification

Editor's draft

Status in Chromium

Blink


In developer trial (Behind a flag) (tracking bug) in:

  • Chrome for desktop release 84
  • Chrome for Android release 84

Consensus & Standardization

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

Owners

Intent to Prototype url

Intent to Prototype thread

Comments

Enabled as part of a gradual rollout over the course of M84 with the intent of enabling by default in M85.

Last updated on 2020-10-26