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 - 86: Supported
  2. 87: Supported

Firefox

  1. 2 - 82: Not supported
  2. 83: Not supported
  3. 84 - 85: Not supported

Chrome

  1. 4 - 24: Not supported
  2. 25 - 86: Supported
  3. 87: Supported
  4. 88 - 90: Supported

Safari

  1. 3.1 - 6.1: Not supported
  2. 7 - 13.1: Supported
  3. 14: Supported
  4. TP: Supported

Opera

  1. 9 - 11.6: Supported
  2. 12 - 71: Supported
  3. 72: Supported

iOS Safari

  1. 3.2 - 6.1: Not supported
  2. 7 - 13.7: Supported
  3. 14: Supported

Opera Mini

  1. all: Supported

Android Browser

  1. 2.1 - 4.3: Not supported
  2. 4.4 - 4.4.4: Supported
  3. 81: Supported

Blackberry Browser

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

Opera Mobile

  1. 10 - 12: Not supported
  2. 12.1: Supported
  3. 59: Supported

Chrome for Android

  1. 86: Supported

Firefox for Android

  1. 82: Not supported

IE Mobile

  1. 10: Supported
  2. 11: Supported

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 11.2: Supported
  2. 12.0: 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