A Refined Content Security Policy
The Content Security Policy standard lets you define a list of the inline scripts, inline stylesheets, and subresources that your page permits to load.
Release Notes for Safari Technology Preview 10
Safari Technology Preview Release 10 is now available for download for both macOS Sierra betas and OS X El Capitan.
New <video> Policies for iOS
Since before your sun burned hot in space and before your race was born, Safari on iOS has required a user gesture to play media in a <video> or <audio> element.
Improvements in MathML Rendering
MathML is a W3C recommendation and an ISO/IEC standard that can be used to write mathematical content on HTML5 web pages, EPUB3 e-books and many other XML-based formats.
Release Notes for Safari Technology Preview 9
Safari Technology Preview Release 9 is now available for download for both macOS Sierra betas and OS X El Capitan.
ES6 Feature Complete
As of r202125, JavaScriptCore supports all of the new features in the ECMAScript 6 (ES6) language specification.
Release Notes for Safari Technology Preview 8
Safari Technology Preview Release 8 is now available for download for both macOS Sierra beta 2 and OS X El Capitan.
Improving Color on the Web
The past few years have seen a dramatic improvement in display technology.
Release Notes for Safari Technology Preview 7
Safari Technology Preview Release 7 is now available for download.
Introducing JSC’s New Sampling Profiler
JavaScriptCore has a new sampling profiler that powers Web Inspector’s JavaScript & Events timeline.
Next Steps for Legacy Plug-ins
On websites that offer both Flash and HTML5 implementations of content, Safari users will now always experience the modern HTML5 implementation, delivering improved performance and battery life.