Web Workers
- LSMethod of running scripts in the background, isolated from the web page
Chrome
- 4 - 116: Supported
- 117: Supported
- 118 - 120: Supported
Edge
- 12 - 116: Supported
- 117: Supported
Safari
- 3.1 - 3.2: Not supported (but has polyfill available)
- 4 - 16.6: Supported
- 17.0: Supported
- 17.1 - TP: Supported
Firefox
- 2 - 3: Not supported (but has polyfill available)
- 3.5 - 116: Supported
- 117: Supported
- 118 - 120: Supported
Opera
- 9 - 9.6: Not supported
- 10 - 10.5: Not supported (but has polyfill available)
- 10.6 - 101: Supported
- 102: Supported
IE
- 5.5: Not supported
- 6 - 9: Not supported (but has polyfill available)
- 10: Supported
- 11: Supported
Chrome for Android
- 117: Supported
Safari on iOS
- 3.2 - 4.3: Not supported
- 5 - 16.6: Supported
- 17.0: Supported
- 17.1: Supported
Samsung Internet
- 4 - 21: Supported
- 22: Supported
Opera Mini
- all: Not supported
Opera Mobile
- 10: Not supported (but has polyfill available)
- 11 - 12.1: Supported
- 73: Supported
UC Browser for Android
- 15.5: Supported
Android Browser
- 2.1: Supported
- 2.2 - 4.3: Not supported
- 4.4 - 4.4.4: Supported
- 117: Supported
Firefox for Android
- 117: Supported
QQ Browser
- 13.1: Supported
Baidu Browser
- 13.18: Supported
KaiOS Browser
- 2.5: Supported
- 3: Supported
- Sub-features:
- Shared Web Workers