XHTML+SMIL animation
- UNOFFMethod of using SMIL animation in web pages
IE
- 5.5: Not supported
- 6 - 8: Partial support
- 9 - 10: Not supported
- 11: Not supported
Edge
- 12 - 18: Not supported
- 79 - 94: Not supported (but has polyfill available)
- 95: Not supported (but has polyfill available)
Firefox
- 2 - 92: Not supported (but has polyfill available)
- 93: Not supported (but has polyfill available)
- 94 - 95: Not supported (but has polyfill available)
Chrome
- 4 - 94: Not supported (but has polyfill available)
- 95: Not supported (but has polyfill available)
- 96 - 98: Not supported (but has polyfill available)
Safari
- 3.1 - 14.1: Not supported (but has polyfill available)
- 15: Not supported (but has polyfill available)
- TP: Not supported (but has polyfill available)
Opera
- 9 - 79: Not supported (but has polyfill available)
- 80: Not supported (but has polyfill available)
Safari on iOS
- 3.2 - 14.8: Not supported (but has polyfill available)
- 15: Not supported (but has polyfill available)
Opera Mini
- all: Not supported (but has polyfill available)
Android Browser
- 2.1 - 4.4.4: Not supported (but has polyfill available)
- 94: Not supported (but has polyfill available)
Opera Mobile
- 10 - 12.1: Not supported (but has polyfill available)
- 64: Not supported (but has polyfill available)
Chrome for Android
- 94: Not supported (but has polyfill available)
Firefox for Android
- 92: Not supported (but has polyfill available)
UC Browser for Android
- 12.12: Not supported (but has polyfill available)
Samsung Internet
- 4 - 14.0: Not supported (but has polyfill available)
- 15.0: Not supported (but has polyfill available)
QQ Browser
- 10.4: Not supported (but has polyfill available)
Baidu Browser
- 7.12: Not supported (but has polyfill available)
KaiOS Browser
- 2.5: Not supported (but has polyfill available)
Internet Explorer supports the W3C proposal HTML+TIME, which is largely the same as XHTML+SMIL