Release Notes for Safari Technology Preview 24Safari Technology Preview Release 24 is now available for download for macOS Sierra. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers WebKit revisions 211256-212356. User Timing Added User Timing as an experimental feature (r211332) Implemented PerformanceObserver for User Timing (r211406) Added support for Performanc
