asm.js

- OTHER

An extraordinarily optimizable, low-level subset of JavaScript, intended to be a compile target from languages like C++.

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12
  2. 13 - 18
  3. 79 - 81
  4. 83

Firefox

  1. 2 - 21
  2. 22 - 77
  3. 78
  4. 79 - 80

Chrome

  1. 4 - 27
  2. 28 - 81
  3. 83
  4. 84 - 86

Safari

  1. 3.1 - 13
  2. 13.1
  3. 14 - TP

Opera

  1. 9 - 12.1
  2. 15 - 68
  3. 69

iOS Safari

  1. 3.2 - 13.3
  2. 13.4
  3. 14.0

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 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
  2. 5 - 11.2
  3. 12.0

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5
Resources:
Homepage
Bringing Asm.js to Chakra and Microsoft Edge
Microsoft Edge support announcement
Source for spec and tools