CSS Device Adaptation
- WDMethod of overriding the size of viewport in web page using the @viewport rule, replacing Apple's own popular <meta> viewport implementation. Includes the extend-to-zoom width value.
IE
- 5.5 - 9: Not supported
- 10: Partial support
- 11: Partial support
Edge
- 12 - 18: Partial support
- 79 - 94: Disabled by default
- 95: Disabled by default
Firefox
- 2 - 92: Not supported
- 93: Not supported
- 94 - 95: Not supported
Chrome
- 4 - 28: Not supported
- 29 - 94: Disabled by default
- 95: Disabled by default
- 96 - 98: Disabled by default
Safari
- 3.1 - 14.1: Not supported
- 15: Not supported
- TP: Not supported
Opera
- 9 - 39: Not supported
- 40 - 79: Disabled by default
- 80: Disabled by default
Safari on iOS
- 3.2 - 14.8: Not supported
- 15: Not supported
Opera Mini
- all: Partial support
Android Browser
- 2.1 - 4.4.4: Not supported
- 94: Not supported
Opera Mobile
- 10: Not supported
- 11 - 12.1: Partial support
- 64: Not supported
Chrome for Android
- 94: Not supported
Firefox for Android
- 92: Not supported
UC Browser for Android
- 12.12: Not supported
Samsung Internet
- 4 - 14.0: Not supported
- 15.0: Not supported
QQ Browser
- 10.4: Disabled by default
Baidu Browser
- 7.12: Not supported
KaiOS Browser
- 2.5: Not supported
Due to lack of implementation this specification is slated to be retired.