# Safari Technology Preview 228 Release Notes Learn about the latest web technology updates in Safari Technology Preview: Accessibility, CSS, DOM, Editing, Forms, JavaScript, Media, PDF, Rendering, SVG, Service Worker, Web API, Web Extensions, Web Inspector, WebGPU, and WebRTC. ## Overview [Safari Technology Preview](https://webkit.org/blog/6017/introducing-safari-technology-preview/) Release 228 is now [available for download](https://developer.apple.com/safari/resources/) for macOS Tahoe and macOS Sequoia. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes WebKit changes between: [299100@main…299754@main](https://github.com/WebKit/WebKit/compare/36615bee766c36705ff40a0ee99145973d03e0ed...8d2ed2e447fadb4bce5db43cbc54af8f37c00042). ### Accessibility #### New Features - Added support for auto-expanding details and hidden=“until-found” elements for text searches done via assistive technologies. ([299649@main](https://commits.webkit.org/299649@main)) (159913471) #### Resolved Issues - Fixed an issue where VoiceOver reports the wrong radio count with a dynamically inserted radio option. ([299585@main](https://commits.webkit.org/299585@main)) (159221583) - Fixed exposing content within dynamically expanded details elements in the accessibility tree. ([299601@main](https://commits.webkit.org/299601@main)) (159291226) ### CSS #### New Features - Added support for `:scope` when the scoping root is `:visited`. ([299560@main](https://commits.webkit.org/299560@main)) (157588890) - Added support for using `color-mix()` without a color space, defaulting to `oklab`. ([299440@main](https://commits.webkit.org/299440@main)) (159039709) - Added support for `display-p3-linear` colors in CSS. ([299381@main](https://commits.webkit.org/299381@main)) (159579630) #### Resolved Issues - Fixed `-webkit-user-select: none` disabling find-in-page in Safari. ([299624@main](https://commits.webkit.org/299624@main)) (8081660) - Fixed anchor position to only generate position options on base style. ([299135@main](https://commits.webkit.org/299135@main)) (158900076) - Fixed out-of-flow box with no sibling ignoring align-content. ([299107@main](https://commits.webkit.org/299107@main)) (159097576) - Fixed performance of `:has(> .changed) .subject` selectors. ([299162@main](https://commits.webkit.org/299162@main)) (159173631) - Fixed handling of the `::first-line` pseudo-element when floats prevent the initial line from containing inline content, ensuring correct styling is applied to the actual first formatted line. ([299402@main](https://commits.webkit.org/299402@main)) (159613287) ### DOM #### Resolved Issues - Fixed an issue where command-clicking to open a link in a new tab navigates the current tab. ([299537@main](https://commits.webkit.org/299537@main)) (57216935) ### Editing #### Resolved Issues - Fixed jumbled text when copy/pasting bidirectional text starting with left-to-right. ([299176@main](https://commits.webkit.org/299176@main)) (152236717) ### Forms #### Resolved Issues - Fixed `` element with long `` text causing horizontal scrolling in grid or flex containers. ([299631@main](https://commits.webkit.org/299631@main)) (141633685) - Fixed checkboxes and radio buttons missing borders in the filled state when “Increased Contrast” is enabled on macOS. ([299269@main](https://commits.webkit.org/299269@main)) (159226308) - Fixed switch controls that may be sized incorrectly due to incorrect margins. ([299543@main](https://commits.webkit.org/299543@main)) (159729284) ### JavaScript #### New Features - Added support for Wasm Memory buffer APIs. ([299236@main](https://commits.webkit.org/299236@main)) (159305098) - Added support for Wasm JS String Builtins. ([299455@main](https://commits.webkit.org/299455@main)) (159679027) #### Resolved Issues - Fixed non-standard `new Date(2024-12-3)` yielding to an “Invalid Date” error. ([299182@main](https://commits.webkit.org/299182@main)) (141044926) - Fixed poor error messages for destructing null or undefined values. ([299244@main](https://commits.webkit.org/299244@main)) (159340067) ### Media #### Resolved Issues - Fixed western Arabic numbers being displayed in the video viewer instead of eastern Arabic numbers. ([299348@main](https://commits.webkit.org/299348@main)) (141281469) - Fixed handling of null media accessibility caption profile. ([299204@main](https://commits.webkit.org/299204@main)) (159134245) - Fixed hiding and resuming a webm video that sometimes causes a decoding error. ([299366@main](https://commits.webkit.org/299366@main)) (159508950) ### PDF #### Resolved Issues - Fixed VoiceOver not recognizing the password form. ([299180@main](https://commits.webkit.org/299180@main)) (155907450) ### Rendering #### Resolved Issues - Fixed applying wavy underline text decoration with `-webkit-text-security` that hangs if the font size is too small. ([299293@main](https://commits.webkit.org/299293@main) (157024940) - Fixed string search freezing when subject has large number (>1000). ([292919@main](https://commits.webkit.org/292919@main)) (159129919) - Fixed `position-visibility: anchors-visible` visibility heuristic in certain situations. ([299554@main](https://commits.webkit.org/299554@main)) (159790886) - Fixed buttons with box shadow being broken. ([299603@main](https://commits.webkit.org/299603@main)) (159888287) ### SVG #### Resolved Issues - Fixed an issue where a dynamic change in a CSS property of an SVG element does not get reflected in the instances of the SVGElement. ([299112@main](https://commits.webkit.org/299112@main)) (98577657) - Fixed an issue where `` element was not applied to the root element. ([299459@main](https://commits.webkit.org/299459@main)) (159705519) ### Service Worker #### Resolved Issues - Fixed an issue where service worker downloads are not being saved to Downloads folder. ([299564@main](https://commits.webkit.org/299564@main)) (154501503) ### Web API #### Resolved Issues - Fixed preventing the `javascript:` protocol in `navigation.navigate()`. ([299235@main](https://commits.webkit.org/299235@main)) (158867866) - Fixed an issue where `click` and `auxclick` event targeting does not follow pointer capture target override. ([299567@main](https://commits.webkit.org/299567@main)) (159477637) ### Web Extensions #### Resolved Issues - Fixed an issue that caused the web page to crash when navigating to certain URLs with an extension enabled. ([299173@main](https://commits.webkit.org/299173@main)) (158180410) ### Web Inspector #### Resolved Issues - Fixed an issue where accepting a completion suggestion for a shorthand property value would malform the combined value. ([299157@main](https://commits.webkit.org/299157@main)) (159107788) - Fixed issue where searching on certain text fails to find matches. ([299541@main](https://commits.webkit.org/299541@main)) (159272725) ### WebGPU #### Resolved Issues - Fixed incorrect handling of some PNG pixel formats in WebGPU. ([299404@main](https://commits.webkit.org/299404@main)) (158797747) ### WebRTC #### Resolved Issues - Fixed camera indicator staying enabled even after ending a meeting/access to camera. ([299161@main](https://commits.webkit.org/299161@main)) (152962650) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)