Apple has recently released Safari Technology Preview 198, an update that includes support for macOS 15 Sequoia beta and macOS Sonoma. This comes after the recent launch of the second public beta for macOS 14.6, which was also released alongside second public betas for iOS 14.6, iPadOS 14.6, and more.
The latest version of Safari Technology Preview brings several fixes and improvements in various areas such as CSS, Forms, JavaScript, Media and more. Apple first introduced this experimental browser back in March 2016 as a tool for developers to test new features that could potentially be included in future Safari releases.
Safari Technology Preview is available to anyone who has the browser installed and runs alongside the Safari app on Mac. However, regular users are advised not to install this version as it is primarily intended for developers to test upcoming features. Apple values feedback from developers to refine these new features before they are included in the final version of Safari.
If you already have Safari Technology Preview installed, you can check for updates in System Preferences or System Settings to get the latest update. For more information on the changes and improvements included in this update, you can refer to the full release notes provided by Apple.