Safari Technology Preview Release 58 is now available for download for macOS High Sierra. With this release, Safari Technology Preview is now available for betas of macOS Mojave. If you already have Safari Technology Preview installed on macOS High Sierra, you can update from the Mac App Store’s Updates tab.
This release covers the same revisions of WebKit from Safari Technology Preview 57, but includes new Safari and WebKit features that will be present in Safari 12. The following Safari 12 features are new to Safari Technology Preview 58:
Icons in Tabs. You can enable showing website icons in tabs in Safari’s Tabs preferences.
Automatic Strong Passwords. Safari automatically generates strong, unique passwords when signing up for accounts or changing passwords on websites. New to Safari 12 and Safari Technology Preview 58, generated passwords can be customized using the
passwordrules attribute. See Apple’s Password Rules Validation Tool for more information.
Many more WebKit features in Safari 12 are present in this release of Safari Technology Preview and have been in past releases. You can read more about these changes and many others in What’s New in Safari 12.