Sec-CH-UA-Form-Factors client hint

Category: Miscellaneous
Type: New or changed feature
Status: In development (Chrome In development)
Intent stage: None

Summary

This hint indicates one or more of the "form-factor" of the user-agent / device, so that the site can tailor its response.

Motivation

We would like to allow sites to customize resources and presentation based on the form factor of the user's device, giving the user the best experience of the site. Existing solutions involve fragile pattern-matching on the UA string.

Standards & signals

Specification: https://wicg.github.io/ua-client-hints/#sec-ch-ua-form-factor
Firefox: Neutral
Safari: No signal — Requested feedback
Web developers: No signals
Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1442283

Docs: https://github.com/djmitche/web-explainers/blob/main/sec-ch-ua-form-factor.md

Explainers: https://github.com/djmitche/web-explainers/blob/main/sec-ch-ua-form-factor.md

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