Release Notes for Safari Technology Preview 126 with Safari 15 Features

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2021-06-17 18:30:06

Safari Technology Preview Release 126 is now available for download for macOS Big Sur and betas of macOS Monterey. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS.

Streamlined tab bar. Use Tab Groups to save and organize your tabs. Experience the new design. Test your site. Experiment with theme-color.

Improved Safari Web Extensions. Try out the support for declarativeNetRequest, which expanded to 150K content blocking rules and non-persistent background pages for improved performance.

Web technologies. Experience and test the HTML, CSS, JavaScript, and other web technologies that are available in Safari 15 Beta and included in previous Safari Technology Preview releases.

If you see bugs or unexpected behavior with the interface of Safari Technology Preview, please file Feedback in Apple’s Feedback Assistant. If you come across an implementation bug in web technology, or have a request, please file a ticket at bugs.webkit.org.

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