| Browser | Platforms | H.264(MP4) | VP8(WebM) | VP9(WebM) | Theora |
|---|---|---|---|---|---|
| IE 9–current | Windows (vista, 7, 8) | Yes | No | No | No |
| Firefox 3.5 | Windows | No | No | No | Yes |
| Firefox 4.0 | Windows | No | Yes | No | Yes |
| Firefox 21.0 | Windows | Yes(Windows7+) | Yes | No | Yes |
| Firefox 22.0 | Windows | Yes(Vista+) | Yes | No | Yes |
| Firefox 26.0 | Windows | Yes(Vista+) | Yes | No | Yes |
| Firefox 28.0–current | Windows | Yes(Vista+) | Yes | Yes | Yes |
| Firefox 3.5 | Linux | No | No | No | Yes |
| Firefox 4.0 | Linux | No | Yes | No | Yes |
| Firefox 21.0 | Linux | No | Yes | No | Yes |
| Firefox 22.0 | Linux | No | Yes | No | Yes |
| Firefox 26.0 | Linux | Yes | Yes | No | Yes |
| Firefox 28.0–current | Linux | Yes(Vista+) | Yes | Yes | Yes |
| Firefox 3.5 | Mac OSX | No | No | No | Yes |
| Firefox 4.0 | Mac OSX | No | Yes | No | Yes |
| Firefox 21.0 | Mac OSX | No | Yes | No | Yes |
| Firefox 22.0 | Mac OSX | No | Yes | No | Yes |
| Firefox 26.0 | Mac OSX | No | Yes | No | Yes |
| Firefox 28.0 | Mac OSX | No | Yes | Yes | Yes |
| Firefox 34.0–current | Mac OSX | Yes | Yes | Yes | Yes |
| Safari 3.1–current | OSX Leopard, OSX Snow Leopard, OSX Lion, OSX Moutain Lion, OSX Mavericks, Yosemite |
Yes | No | No | No |
| Chrome 3 | Linux, Mac OS X, Windows | Yes | No | No | Yes |
| Chrome 6 | Linux, Mac OS X, Windows | Yes | Yes | No | Yes |
| Chrome 29–current | Linux, Mac OS X, Windows | Yes | Yes | Yes | Yes |
| iOS Safari | iOS | Yes | No | No | No |
| Android browser 2.3 | Android | No | Yes | No | Yes |
| Android browser 3.0 | Android | Yes | Yes | No | Yes |
| Browser | Platforms | H.264(MP4) | VP8(WebM) | VP9(WebM) | Theora |