As I understand it, WebKit&#x27;s feature flags will not include the webkit prefix:<p><i>&quot;WebKit’s new policy is to implement experimental features unprefixed&quot;</i><p>But Mozilla still plans for experimental features to be prefixed:<p><i>&quot;Mozilla supports a number of extensions to CSS that are prefixed with -moz-.<p>Some of these properties have been included in draft CSS specification for inclusion in the final recommendation, but are still experimental... Once standardized, and the support for the un-prefixed variant added, the prefixed properties are dropped.&quot;</i>