Web Workers
- LSMethod of running scripts in the background, isolated from the web page
IE
- 5.5: Not supported
- 6 - 9: Not supported (but has polyfill available)
- 10: Supported
- 11: Supported
Edge
- 12 - 102: Supported
- 103: Supported
Firefox
- 2 - 3: Not supported (but has polyfill available)
- 3.5 - 100: Supported
- 101: Supported
- 102 - 103: Supported
Chrome
- 4 - 102: Supported
- 103: Supported
- 104 - 106: Supported
Safari
- 3.1 - 3.2: Not supported (but has polyfill available)
- 4 - 15.4: Supported
- 15.5: Supported
- 16.0 - TP: Supported
Opera
- 9 - 9.6: Not supported
- 10 - 10.5: Not supported (but has polyfill available)
- 10.6 - 85: Supported
- 86: Supported
- 87: Supported
Safari on iOS
- 3.2 - 4.3: Not supported
- 5 - 15.4: Supported
- 15.5: Supported
- 16.0: Supported
Opera Mini
- all: Not supported
Android Browser
- 2.1: Supported
- 2.2 - 4.3: Not supported
- 4.4 - 4.4.4: Supported
- 101: Supported
Opera Mobile
- 10: Not supported (but has polyfill available)
- 11 - 12.1: Supported
- 64: Supported
Chrome for Android
- 102: Supported
Firefox for Android
- 101: Supported
UC Browser for Android
- 12.12: Supported
Samsung Internet
- 4 - 16.0: Supported
- 17.0: Supported
QQ Browser
- 10.4: Supported
Baidu Browser
- 7.12: Supported
KaiOS Browser
- 2.5: Supported
- Sub-features:
- Shared Web Workers