Apple today released the first update to its Safari Technology Preview version of Safari designed for software developers.

This second release (version 9.1.1) comes with several changes that have to do with JavaScript, CSS, accessibility, the browser’s Web Inspector feature, and most generally, the latest from the WebKit open source browser engine.

With respect to JavaScript in particular, the browser now ships with enhanced support for ECMAScript 6, as that has previously come to other modern browsers, like Chrome, Edge, and Firefox. You can find a full list of changes in the Release Notes.

The new version is becoming available two weeks after the initial release.

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You can get the new version directly from Apple’s website, or alternatively you can grab it from the Updates section in the Mac App Store (Mac only).

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