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Safari Technology Preview 65 Brings Bug Fixes and Feature Improvements

Safari Technology Preview 65 Brings Bug Fixes and Feature Improvements

Apple on Monday released Safari Technology Preview 65, the latest version of their developer preview web browser. The preview version of the popular browser allows developers and other interested users to try out features that may or may not, debut in future public release versions of Safari.

Release 65

Storage Access API

  • Made a change to maintain access through same-site navigations of an iframe
  • Updated the Storage Access API prompt to show the eTLD+1s, not the full host names


  • Fixed scrubbing video with Touch Bar on YouTube to prevent video playback freezing
  • Fixed muted elements not updating their Now Playing status when unmuted

Apple Pay

  • Added Web Inspector auto-complete keywords for -apple-pay-button-style and -apple-pay-button-type
  • Changed to allow $0 totals
  • Changed PaymentRequest.show() to reject when an unsupported ApplePayRequestversion is specified
  • Introduced Apple Pay JS v4
  • Introduced new values for -apple-pay-button-type

Payment Request

  • Added an onpayerdetailchange event handler to PaymentResponse
  • Implemented the MerchantValidationEvent constructor
  • Removed PaymentAddress.languageCode

Shadow DOM

  • Changed to compose click events from click()
  • Fixed the focus navigation order in slot fallback contents

Fetch API

  • Made a change to stop checking the Request.integrity value in no-CORS mode

Service Workers

  • Fixed undefined self.isSecureContext in Service Workers


  • Added getModifierState to MouseEvent

Web Inspector

  • Added auto-completion for event breakpoints
  • Added support for breakpoints for timers and animation-frame events
  • Fixed deleting multiple event breakpoints by repeatedly hitting delete
  • Fixed the color picker to allow entering decimal numbers for opacity
  • Fixed typos in some compositing reasons
  • Fixed the Search bar being too narrow in some localizations
  • Fixed console.inspect(sessionStorage) to correctly show the Session Storage content view if the Storage tab was previously unvisited
  • Fixed console.log() to show the passed string when a certain format is used
  • Fixed the JSContext Inspector to correctly show Scripts in the Resources tab

WebGL 2

  • Updated WebGL 2 implementation to handle READ_FRAMEBUFFER and default framebuffer specification conformance

Web Assembly

  • Updated Web Assembly to parse wasm modules in a streaming fashion

Safari extensions

  • Messages from a Safari App Extension to its content script are now delivered to the correct page after a back or forward navigation

The update can be downloaded from the Safari Technology Preview website, or if the browser is already installed, it can be updated via the “Update” tab in the Mac App Store. Full release notes for the update are available on the same website.

While the preview is intended for use by developers and advanced users, in order to provide Apple with feedback on the development of the Safari browser, it can be run side-by-side with the release version of Safari. The app doesn’t require a developer account to download and install. For more information, visit the Safari Technology Preview website.