ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family

- WD

Allows more control when choosing system interface fonts

IE

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

Edge

  1. 12 - 80: Not supported
  2. 81: Not supported

Firefox

  1. 2 - 75: Not supported
  2. 76: Not supported
  3. 77 - 78: Not supported

Chrome

  1. 4 - 80: Not supported
  2. 81: Not supported
  3. 83 - 85: Not supported

Safari

  1. 3.1 - 13: Not supported
  2. 13.1: Supported
  3. TP: Supported

Opera

  1. 9 - 67: Not supported
  2. 68: Not supported

iOS Safari

  1. 3.2 - 13.3: Not supported
  2. 13.4: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Not supported

Blackberry Browser

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

Opera Mobile

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

Chrome for Android

  1. 81: Not 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: Not supported

Samsung Internet

  1. 4 - 10.1: Not supported
  2. 11.1: Not supported

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
ui-serif Firefox support bug
ui-sans-serif Firefox support bug
ui-monospace Firefox support bug
ui-rounded Firefox support bug
WebKit Safari 13.1 announcement