Allows developers to selectively enable and disable the use of images with legacy image formats through the Feature-Policy HTTP header or the <iframe> 'allow' attribute. This provides more control over images using legacy formats, on a per-origin basis. Use this policy to improve image loading performance. The identifier for the feature in policies is 'legacy-image-formats'. By default, 'legacy-image-formats' is allowed in all frames.

Demo

Documentation

Status in Chromium

Blink


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

  • Chrome for desktop release 68

Consensus & Standardization

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

  • No signal
  • No signal
  • No signal
  • No signals

Owner

Last updated on 2020-11-09