CSS3 Box-sizing
- WDMethod of specifying whether or not an element's borders and padding should be included in size units
Chrome
- 4 - 9: Supported
- 10 - 119: Supported
- 120: Supported
- 121 - 123: Supported
Edge
- 12 - 119: Supported
- 120: Supported
Safari
- 3.1 - 5: Supported
- 5.1 - 17.0: Supported
- 17.1: Supported
- 17.2 - TP: Supported
Firefox
- 2 - 28: Supported
- 29 - 119: Supported
- 120: Supported
- 121 - 123: Supported
Opera
- 9: Not supported
- 9.5 - 103: Supported
- 104: Supported
IE
- 5.5 - 7: Not supported (but has polyfill available)
- 8 - 10: Supported
- 11: Supported
Chrome for Android
- 119: Supported
Safari on iOS
- 3.2 - 4.3: Supported
- 5 - 17.0: Supported
- 17.1: Supported
- 17.2: Supported
Samsung Internet
- 4 - 22: Supported
- 23: Supported
Opera Mini
- all: Supported
Opera Mobile
- 10 - 12.1: Supported
- 73: Supported
UC Browser for Android
- 15.5: Supported
Android Browser
- 2.1 - 3: Supported
- 4 - 4.4.4: Supported
- 119: Supported
Firefox for Android
- 119: Supported
QQ Browser
- 13.1: Supported
Baidu Browser
- 13.18: Supported
KaiOS Browser
- 2.5: Supported
- 3: Supported
Firefox versions before 57 also supported the padding-box
value for box-sizing
, though this value was been removed from the specification and later versions of the browser.