CSS3 tab-size

- CR

Method of customizing the width of the tab character. Only effective using 'white-space: pre', 'white-space: pre-wrap', and 'white-space: break-spaces'.

Chrome

  1. 4 - 20: Not supported
  2. 21 - 41: Partial support
  3. 42 - 125: Supported
  4. 126: Supported
  5. 127 - 129: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 124: Supported
  3. 125: Supported

Safari

  1. 3.1 - 6: Not supported
  2. 6.1 - 13: Partial support
  3. 13.1 - 17.4: Supported
  4. 17.5: Supported
  5. 17.6 - TP: Supported

Firefox

  1. 2 - 3.6: Not supported
  2. 4 - 52: Partial support
  3. 53 - 90: Supported
  4. 91 - 126: Supported
  5. 127: Supported
  6. 128 - 130: Supported

Opera

  1. 9 - 10.5: Not supported
  2. 10.6 - 12.1: Partial support
  3. 15 - 28: Partial support
  4. 29 - 109: Supported
  5. 110: Supported

IE

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

Chrome for Android

  1. 125: Supported

Safari on iOS

  1. 3.2 - 6.1: Not supported
  2. 7 - 13.3: Partial support
  3. 13.4 - 17.4: Supported
  4. 17.5: Supported
  5. 17.6 - 18.0: Supported

Samsung Internet

  1. 4 - 24: Supported
  2. 25: Supported

Opera Mini

  1. all: Partial support

Opera Mobile

  1. 10: Not supported
  2. 11 - 12.1: Partial support
  3. 80: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.3: Not supported
  2. 4.4 - 4.4.4: Partial support
  3. 125: Supported

Firefox for Android

  1. 126: Supported

QQ Browser

  1. 14.9: Supported

Baidu Browser

  1. 13.52: Supported

KaiOS Browser

  1. 2.5: Partial support
  2. 3: Partial support
Resources:
Firefox bug to unprefix `-moz-tab-size`
MDN Web Docs - CSS tab-size