Audio Tracks

- LS

Method of specifying and selecting between multiple audio tracks. Useful for providing audio descriptions, director's commentary, additional languages, alternative takes, etc.

IE

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

Edge

  1. 12 - 18: Supported
  2. 79: Disabled by default
  3. 80: Disabled by default

Firefox

  1. 2 - 32: Not supported
  2. 33 - 72: Disabled by default
  3. 73: Disabled by default
  4. 74 - 75: Disabled by default

Chrome

  1. 4 - 44: Not supported
  2. 45 - 79: Disabled by default
  3. 80: Disabled by default
  4. 81 - 83: Disabled by default

Safari

  1. 3.1 - 6: Not supported
  2. 6.1 - 12.1: Supported
  3. 13: Supported
  4. TP: Supported

Opera

  1. 9 - 31: Not supported
  2. 32 - 65: Disabled by default
  3. 66: Disabled by default

iOS Safari

  1. 3.2 - 6.1: Not supported
  2. 7 - 13.1: Supported
  3. 13.2: Supported
  4. 13.3: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 80: Not supported

Blackberry Browser

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

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 46: Disabled by default

Chrome for Android

  1. 80: Disabled by default

Firefox for Android

  1. 68: Not supported

IE Mobile

  1. 10: Supported
  2. 11: Supported

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4 - 9.2: Not supported
  2. 10.1: Not supported

QQ Browser

  1. 1.2: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Disabled by default
Resources:
MSDN article