Client Hints: DPR, Width, Viewport-Width

- OTHER

DPR, Width, and Viewport-Width hints enable proactive content negotiation between client and server, enabling automated delivery of optimized assets - e.g. auto-negotiating image DPR resolution.

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79: Supported
  3. 80: Supported

Firefox

  1. 2 - 72: Not supported
  2. 73: Not supported
  3. 74 - 75: Not supported

Chrome

  1. 4 - 45: Not supported
  2. 46 - 79: Supported
  3. 80: Supported
  4. 81 - 83: Supported

Safari

  1. 3.1 - 12.1: Not supported
  2. 13: Not supported
  3. TP: Not supported

Opera

  1. 9 - 32: Not supported
  2. 33 - 65: Supported
  3. 66: Supported

iOS Safari

  1. 3.2 - 13.1: Not supported
  2. 13.2: Not supported
  3. 13.3: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 80: Supported

Blackberry Browser

  1. 7: Not supported
  2. 10: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: Supported

Chrome for Android

  1. 80: Supported

Firefox for Android

  1. 68: Not supported

IE Mobile

  1. 10: Not supported
  2. 11: Not supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 9.2: Supported
  3. 10.1: Supported

QQ Browser

  1. 1.2: Not supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
WebKit Bug 145380 - Add Content-DPR header support
Mozilla Bug 935216 - Implement Client-Hints HTTP header
Automating resource selection with Client Hints
Microsoft Edge feature request on UserVoice