Ruby annotation

- LS

Method of adding pronunciation or other annotations using ruby elements (primarily used in East Asian typography).

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12 - 81
  2. 83

Firefox

  1. 2 - 37
  2. 38 - 75
  3. 76
  4. 77 - 78

Chrome

  1. 4
  2. 5 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 4
  2. 5 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 12.1
  2. 15 - 67
  3. 68

iOS Safari

  1. 3.2 - 4.3
  2. 5 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 2.3
  2. 3 - 4.4.4
  3. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 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

Browsers without native support can still simulate support using CSS. Partial support refers to only supporting basic ruby, may still be missing writing-mode, Complex ruby and CSS3 Ruby.

Resources:
HTML5 Doctor article
Add-on "XHTML Ruby Support" for Firefox
Addon "HTML Ruby" for Firefox support
CSS specification
WebPlatform Docs