Apple Launches Safari Technology Preview 4

Following the release of Safari Technology Preview 3 alongside OS X 10.11.5 Beta 3 late last month, the company has officially launched a brand new build of Safari Preview, Safari Technology Preview 4, to developers for download and testing.

Safari Technology Preview 4 brings several new features as well as other enhancements such as:

  • Allow non-standard HTTP headers in WebSocket handshakes, which makes the 1Password extension work again
  • Fixed Netflix video playback
  • Updated JavaScript
  • Updated CSS
  • Updated Web APIs
  • Updated Web Inspector
  • Updated Accessibility
  • Updated Rendering
  • Improved stability
  • Other bug fixes
Safari Technology Preview 4, which is compatible with OS X 10.11.4 or later, is now available to download through the Safari Dev Center for registered developers.