--- title: Safari Technology Preview 157 Release Notes framework: safari-technology-preview-release-notes role: article role_heading: Article path: safari-technology-preview-release-notes/stp-release-157 --- # Safari Technology Preview 157 Release Notes Preview the latest web technology updates including: Web Inspector, CSS, Rendering, JavaScript, WebCodecs, Web API, Media, Web Animations, HTML, Accessibility, Security, Privacy, and Safari Web Extensions. ## Overview Overview Safari Technology Preview Release 157 is now available for download for macOS Monterey 12.3 or later and macOS Ventura. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS Monterey, or System Settings under General → Software Update on macOS Ventura. This release includes WebKit changes between: 255077@main…255891@main Note: Shared Tab Groups and syncing for Tab Groups, Website Settings, and Web Extensions are not enabled in this release. Web Inspector Elements Tab Added support for event breakpoints to be case-insensitive and regular expression matching (255196@main) Fixed disabling inline breakpoints unexpectedly removing them (255292@main) Fixed inline breakpoints appearing for minified resources before they are pretty-printed (255200@main) CSS Added support for font-synthesis longhand properties (255171@main) Added support for last baseline alignment for CSS Grid (255455@main) Added support for last baseline alignment for Flexbox containers (255383@main) Added support for lh and rlh units (255540@main) Added margin when computing the baseline position for tables (255357@main) Changed outline to follow border-radius (255314@main, 255300@main) Changed to treat rem and rlh as absolute units for font size (255594@main) Changed to allow the font-variant-east-asian shorthand property in any position (255134@main) Changed to only preserve a scroll snap target if there are targets for both axes (255493@main) Changed CSS Keyframe name handling to not allow CSS-wide keywords (255640@main) Changed to use min-intrinsic size to compute min-content size for non-replaced flex items (255858@main) Fixed the display property value of a computed style to be "none" instead of "inline" for an