Resource Hints: preload

- CR

Using <link rel="preload">, browsers can be informed to prefetch resources without having to execute them, allowing fine-grained control over when and how resources are loaded.

IE

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

Edge

  1. 12 - 16: Not supported
  2. 17 - 18: Partial support
  3. 79 - 85: Supported
  4. 86: Supported

Firefox

  1. 2 - 55: Not supported
  2. 56: Partial support
  3. 57 - 80: Disabled by default
  4. 81: Disabled by default
  5. 82 - 83: Disabled by default

Chrome

  1. 4 - 49: Not supported
  2. 50 - 85: Supported
  3. 86: Supported
  4. 87 - 89: Supported

Safari

  1. 3.1 - 10.1: Not supported
  2. 11: Disabled by default
  3. 11.1 - 13.1: Supported
  4. 14: Supported
  5. TP: Supported

Opera

  1. 9 - 36: Not supported
  2. 37 - 70: Supported
  3. 71: Supported

iOS Safari

  1. 3.2 - 10.3: Not supported
  2. 11: Disabled by default
  3. 11.3 - 13.7: Supported
  4. 14: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Supported

Blackberry Browser

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

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 59: Not supported

Chrome for Android

  1. 85: Supported

Firefox for Android

  1. 79: Disabled by default

IE Mobile

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

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 11.2: Supported
  3. 12.0: Supported

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported

Firefox has newly rewritten their implementation and plans to enable it by default in a version closely succeeding 78

Resources:
Firefox meta support bug
MDN Web Docs - Preloading content with rel="preload"
Preload: What Is It Good For?