On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 140 on 2025-09-02
In Chrome Android version 140 on 2025-09-02
In Edge version 140 on 2025-09-05
In Firefox version 34 on 2014-12-01 Note: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS. From Firefox 4 to Firefox 14 (inclusive), Firefox supported an older, slightly different syntax. See OpenType Font Feature support in Firefox 4.
In Firefox for Android version 34 on 2014-12-01 Note: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox for Android 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox for Android 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS. From Firefox for Android 4 to Firefox for Android 14 (inclusive), Firefox for Android supported an older, slightly different syntax. See OpenType Font Feature support in Firefox for Android 4.
Not in Internet Explorer
Not in Quest Browser
In Opera version 124 on undefined
In Opera Android version 92 on 2025-10-08
In Safari version 10 on 2016-09-20
In Safari on iOS version 10 on 2016-09-13
Not in Samsung Internet
In WebView Android version 140 on 2025-09-02
In WebView on iOS version 10 on 2016-09-13