seamless attribute for iframes
- UNOFFThe seamless attribute makes an iframe's contents actually part of a page, and adopts the styles from its hosting page. The attribute has been removed from both the WHATWG and the W3C HTML5 specifications.
IE
- 5.5 - 10: Not supported
- 11: Not supported
Edge
- 12 - 85: Not supported
- 86: Not supported
Firefox
- 2 - 80: Not supported
- 81: Not supported
- 82 - 83: Not supported
Chrome
- 4 - 19: Not supported
- 20 - 26: Disabled by default
- 27 - 85: Not supported
- 86: Not supported
- 87 - 89: Not supported
Safari
- 3.1 - 6.1: Not supported
- 7 - 7.1: Not supported
- 8 - 13.1: Not supported
- 14: Not supported
- TP: Not supported
Opera
- 9 - 70: Not supported
- 71: Not supported
iOS Safari
- 3.2 - 6.1: Not supported
- 7: Not supported
- 8 - 13.7: Not supported
- 14: Not supported
Opera Mini
- all: Not supported
Android Browser
- 2.1 - 4.4.4: Not supported
- 81: Not supported
Blackberry Browser
- 7: Not supported
- 10: Not supported
Opera Mobile
- 10 - 12.1: Not supported
- 59: Not supported
Chrome for Android
- 85: Not supported
Firefox for Android
- 79: Not supported
IE Mobile
- 10: Not supported
- 11: Not supported
UC Browser for Android
- 12.12: Not supported
Samsung Internet
- 4 - 11.2: Not supported
- 12.0: Not supported
QQ Browser
- 10.4: Not supported
Baidu Browser
- 7.12: Not supported
KaiOS Browser
- 2.5: Not supported
Chrome 20-26 had partial support behind a flag, though this was later removed.