CSS widows & orphans

- REC

CSS properties to control when lines break across pages or columns by defining the amount of lines that must be left before or after the break.

IE

  1. 5.5 - 7: Not supported
  2. 8 - 9: Supported
  3. 10: Supported
  4. 11: Supported

Edge

  1. 12 - 89: Supported
  2. 90: Supported

Firefox

  1. 2 - 87: Not supported
  2. 88: Not supported
  3. 89 - 90: Not supported

Chrome

  1. 4 - 24: Not supported
  2. 25 - 89: Supported
  3. 90: Supported
  4. 91 - 93: Supported

Safari

  1. 3.1 - 6.1: Not supported
  2. 7 - 14: Supported
  3. 14.1: Supported
  4. TP: Supported

Opera

  1. 9 - 11.6: Supported
  2. 12 - 74: Supported
  3. 75: Supported

Safari on iOS

  1. 3.2 - 6.1: Not supported
  2. 7 - 14.4: Supported
  3. 14.5: Supported

Opera Mini

  1. all: Supported

Android Browser

  1. 2.1 - 4.3: Not supported
  2. 4.4 - 4.4.4: Supported
  3. 90: Supported

Opera Mobile

  1. 10 - 12: Not supported
  2. 12.1: Supported
  3. 62: Supported

Chrome for Android

  1. 90: Supported

Firefox for Android

  1. 87: Not supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 13.0: Supported
  2. 14.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

  1. 2.5: Not supported

Some older WebKit-based browsers recognize the properties, but do not appear to have actual support

Resources:
CSS last-line: Controlling Widows & Orphans
codrops article on orphans
codrops article on widows
Firefox support bug