Can I use
?

Shared Web Workers

- LS

Method of allowing multiple scripts to communicate with a single web worker.

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 85: Supported
  3. 86: Supported

Firefox

  1. 2 - 28: Not supported
  2. 29 - 80: Supported
  3. 81: Supported
  4. 82 - 83: Supported

Chrome

  1. 4 - 85: Supported
  2. 86: Supported
  3. 87 - 89: Supported

Safari

  1. 3.1 - 4: Not supported
  2. 5 - 6: Supported
  3. 6.1 - 13.1: Not supported
  4. 14: Not supported
  5. TP: Not supported

Opera

  1. 9 - 10.5: Not supported
  2. 10.6 - 70: Supported
  3. 71: Supported

iOS Safari

  1. 3.2 - 4.3: Not supported
  2. 5 - 6.1: Supported
  3. 7 - 13.7: Not supported
  4. 14: Not supported

Opera Mini

  1. all: Not supported

Android Browser

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

Blackberry Browser

  1. 7: Supported
  2. 10: Supported

Opera Mobile

  1. 10: Support unknown
  2. 11 - 12.1: Supported
  3. 59: Not supported

Chrome for Android

  1. 85: Not supported

Firefox for Android

  1. 79: Supported

IE Mobile

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

UC Browser for Android

  1. 12.12: Not supported

Samsung Internet

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

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Supported
Resources:
Blog post
Sitepoint article