Selection API

- WD

API for accessing selected content of a document, including the window.getSelection() method, as well as the selectstart & selectionchange events on document.

IE

  1. 5.5
  2. 6 - 8
  3. 9 - 10
  4. 11

Edge

  1. 12 - 81
  2. 83

Firefox

  1. 2 - 42
  2. 43 - 51
  3. 52 - 75
  4. 76
  5. 77 - 78

Chrome

  1. 4 - 14
  2. 15 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 5
  2. 5.1 - 13
  3. 13.1
  4. TP

Opera

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

iOS Safari

  1. 3.2 - 4.1
  2. 4.2
  3. 5 - 13.3
  4. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.1
  2. 4.2
  3. 4.4 - 4.4.4
  4. 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

See also support for the related DOM range

Resources:
Firefox support bug