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.
Chrome
- 4 - 28: Not supported
- 29 - 116: Disabled by default
- 117: Disabled by default
- 118 - 120: Disabled by default
Edge
- 12 - 18: Partial support
- 79 - 116: Disabled by default
- 117: Disabled by default
Safari
- 3.1 - 16.5: Not supported
- 16.6: Not supported
- 17.0 - TP: Not supported
Firefox
- 2 - 116: Not supported
- 117: Not supported
- 118 - 120: Not supported
Opera
- 9 - 39: Not supported
- 40 - 101: Disabled by default
- 102: Disabled by default
IE
- 5.5 - 9: Not supported
- 10: Partial support
- 11: Partial support
Chrome for Android
- 117: Not supported
Safari on iOS
- 3.2 - 16.6: Not supported
- 17.0: Not supported
- 17.1: Not supported
Samsung Internet
- 4 - 21: Not supported
- 22: Not supported
Opera Mini
- all: Partial support
Opera Mobile
- 10: Not supported
- 11 - 12.1: Partial support
- 73: Not supported
UC Browser for Android
- 15.5: Not supported
Android Browser
- 2.1 - 4.4.4: Not supported
- 117: Not supported
Firefox for Android
- 117: Not supported
QQ Browser
- 13.1: Disabled by default
Baidu Browser
- 13.18: Not supported
KaiOS Browser
- 2.5: Not supported
- 3: Not supported
Due to lack of implementation this specification is slated to be retired.