Release Notes for Safari Technology Preview 251

What happened

Safari Technology Preview Release 251 is now available for download for macOS Golden Gate and macOS Tahoe. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update.

( 318186@main ) (181924326) CSS New Features Added support for @supports at-rule(...) , which tests if a CSS at-rule is supported. ( 318482@main ) (87884897) Added support for the object-view-box property.

( 318981@main ) (132624217) Added support for property-scoped and property-index-scoped caching keywords in random() . ( 318960@main ) (176395332) Added support for the random-item() function.

Key facts

• Safari Technology Preview Release 251 is now available for download for macOS Golden Gate and macOS Tahoe.
• If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update.
• ( 318186@main ) (181924326) CSS New Features Added support for @supports at-rule(...) , which tests if a CSS at-rule is supported.
• ( 318482@main ) (87884897) Added support for the object-view-box property.
• ( 318981@main ) (132624217) Added support for property-scoped and property-index-scoped caching keywords in random() .