headers HTTP header: Expect-CT

IE

  1. 6 - 10: Support unknown
  2. 11: Support unknown

Edge

  1. 12 - 100: Supported
  2. 101: Supported

Firefox

  1. 2 - 99: Not supported
  2. 100: Not supported
  3. 101 - 102: Not supported

Chrome

  1. 4 - 60: Not supported
  2. 61 - 100: Supported
  3. 101: Supported
  4. 102 - 104: Supported

Safari

  1. 3.1 - 15.3: Support unknown
  2. 15.4: Support unknown
  3. TP: Support unknown

Opera

  1. 10 - 47: Not supported
  2. 48 - 85: Supported
  3. 86: Supported
  4. 87: Supported

Safari on iOS

  1. 3.2 - 15.3: Support unknown
  2. 15.4: Support unknown

Opera Mini

  1. all: Support unknown

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 101: Not supported

Opera Mobile

  1. 12 - 12.1: Not supported
  2. 64: Supported

Chrome for Android

  1. 101: Supported

Firefox for Android

  1. 100: Not supported

UC Browser for Android

  1. 12.12: Support unknown

Samsung Internet

  1. 4 - 7.4: Not supported
  2. 8.2 - 15.0: Supported
  3. 16.0: Supported

QQ Browser

  1. 10.4: Support unknown

Baidu Browser

  1. 7.12: Support unknown

KaiOS Browser

  1. 2.5: Support unknown