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: Not supported
  2. 11: Not supported

Edge

  1. 12: Disabled by default
  2. 13 - 18: Supported
  3. 79 - 86: Partial support
  4. 87: Partial support

Firefox

  1. 2 - 21: Not supported
  2. 22 - 82: Supported
  3. 83: Supported
  4. 84 - 85: Supported

Chrome

  1. 4 - 27: Not supported
  2. 28 - 86: Partial support
  3. 87: Partial support
  4. 88 - 90: Partial support

Safari

  1. 3.1 - 13.1: Not supported
  2. 14: Not supported
  3. TP: Not supported

Opera

  1. 9 - 12.1: Not supported
  2. 15 - 71: Partial support
  3. 72: Partial support

iOS Safari

  1. 3.2 - 13.7: Not supported
  2. 14: Not supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Partial support

Blackberry Browser

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

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 59: Partial support

Chrome for Android

  1. 86: Partial support

Firefox for Android

  1. 82: Supported

IE Mobile

  1. 10: Not supported
  2. 11: Not supported

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 11.2: Partial support
  3. 12.0: Partial support

QQ Browser

  1. 10.4: Partial support

Baidu Browser

  1. 7.12: Partial support

KaiOS Browser

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