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.

Motivation

Demo

Documentation

Specification

Editor's draft

Status in Chromium

Blink


Enabled by default (tracking bug) in:

  • Chrome for desktop release 89
  • Chrome for Android release 89

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 by default in M89.

Last updated on 2021-06-03