system-ui value for font-family

- WD

Value for font-family that represents the default user interface font.

IE

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

Edge

  1. 12 - 18: Not supported
  2. 79: Supported
  3. 80: Supported

Firefox

  1. 2 - 42: Not supported
  2. 43 - 71: Partial support
  3. 72: Partial support
  4. 73 - 74: Partial support

Chrome

  1. 4 - 52: Not supported
  2. 53 - 55: Partial support
  3. 56 - 79: Supported
  4. 80: Supported
  5. 81 - 83: Supported

Safari

  1. 3.1 - 8: Not supported
  2. 9: Support unknown
  3. 9.1 - 10.1: Partial support
  4. 11 - 12.1: Supported
  5. 13: Supported
  6. TP: Supported

Opera

  1. 9 - 42: Not supported
  2. 43 - 65: Supported
  3. 66: Supported

iOS Safari

  1. 3.2 - 8.4: Not supported
  2. 9 - 10.3: Partial support
  3. 11 - 13.1: Supported
  4. 13.2: Supported
  5. 13.3: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 76: Supported

Blackberry Browser

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

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: Supported

Chrome for Android

  1. 79: Supported

Firefox for Android

  1. 68: Not supported

IE Mobile

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

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 5.4: Not supported
  2. 6.2 - 9.2: Supported
  3. 10.1: Supported

QQ Browser

  1. 1.2: Supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Partial support
Resources:
Firefox support bug
MDN on the font-family property