PerformanceTiming API: fetchStart

IE

  1. 6 - 8: Not supported
  2. 9 - 10: Supported
  3. 11: Supported

Edge

  1. 12 - 90: Supported
  2. 91: Supported

Firefox

  1. 2 - 6: Not supported
  2. 7 - 88: Supported
  3. 89: Supported
  4. 90 - 91: Supported

Chrome

  1. 4 - 5: Not supported
  2. 6 - 90: Supported
  3. 91: Supported
  4. 92 - 94: Supported

Safari

  1. 3.1 - 7.1: Not supported
  2. 8 - 14: Supported
  3. 14.1: Supported
  4. 15 - TP: Supported

Opera

  1. 10 - 12.1: Not supported
  2. 15 - 75: Supported
  3. 76: Supported

Safari on iOS

  1. 3.2 - 8.4: Not supported
  2. 9 - 14.4: Supported
  3. 14.5: Supported

Opera Mini

  1. all: Support unknown

Android Browser

  1. 2.1 - 4.4.4: Support unknown
  2. 91: Supported

Opera Mobile

  1. 12 - 12.1: Not supported
  2. 62: Supported

Chrome for Android

  1. 91: Supported

Firefox for Android

  1. 89: Supported

UC Browser for Android

  1. 12.12: Support unknown

Samsung Internet

  1. 4 - 13.0: Supported
  2. 14.0: Supported

QQ Browser

  1. 10.4: Support unknown

Baidu Browser

  1. 7.12: Support unknown

KaiOS Browser

  1. 2.5: Support unknown