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
  2. 8 - 9
  3. 10
  4. 11

Edge

  1. 12 - 81
  2. 83

Firefox

  1. 2 - 75
  2. 76
  3. 77 - 78

Chrome

  1. 4 - 24
  2. 25 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 6.1
  2. 7 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 11.6
  2. 12 - 67
  3. 68

iOS Safari

  1. 3.2 - 6.1
  2. 7 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.3
  2. 4.4 - 4.4.4
  3. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12
  2. 12.1
  3. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4 - 10.1
  2. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

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