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Safari Technology Preview 87 Provides Bug Fixes and Performance Improvements

Safari Technology Preview 87 Provides Bug Fixes and Performance Improvements

Apple on Wednesday released Safari Technology Preview 87, the latest version of their developer preview web browser. The preview version of Apple’s popular browser offers developers and other interested users the ability to try out features that may or may not, debut in future public release versions of Safari.

Release 87


  • Changed openDatabase to return an empty object when WebSQL is disabled
  • Added an experimental behavior to prevent a 5 second delay for initial paint on pages that are using Google’s anti-flicker optimization when content blockers are enabled

Web Sockets

  • Added support for sending blob messages when using web sockets platform APIs

Payment Request

  • Changed to set state to Closed when show() is called during an active session

Experimental Web Shading Language (WHLSL)

  • Implemented arrays


  • Fixed incorrect clipping with overflow: scroll inside overflow: hidden with border-radius
  • Fixed the preview of a <picture> element to match the element bounds


  • Made WebGPU enabled only on Mojave and later

Web Inspector

  • Implemented console.countReset
  • Implemented console.timeLog
  • Added additional demo audits for other WebInspectorAudit functions
  • Enable the Show Shadow DOM navigation item by default in the Elements tab

Known Issues

  • Open tabs are blank on initial launch after upgrading to Safari Technology Preview 87 and loading all tabs from the last session. To correct this behavior, reload open tabs or relaunch Safari Technology Preview.

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 also available on the Safari Technology Preview 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.

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