Can I use
?

headers HTTP header: Proxy-Authenticate

IE

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

Edge

  1. 12 - 122: Supported
  2. 123: Supported

Firefox

  1. 2 - 123: Supported
  2. 124: Supported
  3. 125 - 127: Supported

Chrome

  1. 4 - 122: Supported
  2. 123: Supported
  3. 124 - 126: Supported

Safari

  1. 3.1 - 17.3: Support unknown
  2. 17.4: Support unknown
  3. 17.5 - TP: Support unknown

Opera

  1. 10 - 108: Support unknown
  2. 109: Supported

Safari on iOS

  1. 3.2 - 17.3: Support unknown
  2. 17.4: Support unknown
  3. 17.5: Support unknown

Opera Mini

  1. all: Support unknown

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 123: Supported

Opera Mobile

  1. 12 - 12.1: Support unknown
  2. 80: Supported

Chrome for Android

  1. 123: Supported

Firefox for Android

  1. 124: Supported

UC Browser for Android

  1. 15.5: Support unknown

Samsung Internet

  1. 4 - 23: Support unknown
  2. 24: Supported

QQ Browser

  1. 14.9: Support unknown

Baidu Browser

  1. 13.52: Support unknown

KaiOS Browser

  1. 2.5: Support unknown
  2. 3: Support unknown