Updating Our Prefixing Policy

WebKit will no longer release experimental features with prefixes (i.e. -webkit-font-smoothing) as many have found that this can actually quite harmful:

Over time this strategy has turned out not to work so well. Many websites came to depend on prefixed properties. They often used every prefixed variant of a feature, which makes CSS less maintainable and JavaScript programs trickier to write. Sites frequently used just the prefixed version of a feature, which made it hard for browsers to drop …

Updating Our Prefixing Policy is a post from CSS-Tricks