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Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced in March 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari.

Safari-Technology-Preview-Feature.jpg

Safari Technology Preview release 145 includes bug fixes and performance improvements for Web Inspector, CSS, JavaScript, WebRTC, and more.

The current Safari Technology Preview release is built on the Safari 15.4 update and it includes Safari 15 features introduced in macOS Monterey.

The Safari Technology Preview update is available through the Software Update mechanism in System Preferences to anyone who has downloaded the browser. Full release notes for the update are available on the Safari Technology Preview website.

Apple's aim with Safari Technology Preview is to gather feedback from developers and users on its browser development process. Safari Technology Preview can run side-by-side with the existing Safari browser and while designed for developers, it does not require a developer account to download.

Article Link: Apple Releases Safari Technology Preview 145 With Bug Fixes and Performance Improvements
 
FYI I had to turn Private Relay off and on again for it to start working after updating STP
 
Looks like Apple got tired of adding “Note: Tab Groups do not sync in this release.” However, I can confirm that tab groups still do not sync in this release.

This is probably a hint that Apple no longer intends to implement this functionality, and that Tech Preview isn’t meant as a full-time Safari replacement.
 
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