# Safari Technology Preview 183 Release Notes Learn about the latest web technology updates in Safari Technology Preview: Accessibility, AutoFill, CSS, Forms, HTML, JavaScript, Media, Rendering, Scrolling, SVG, URLs, Web API, Web Inspector, and WebGL. ## Overview [Safari Technology Preview](https://webkit.org/blog/6017/introducing-safari-technology-preview/) Release 183 is now [available for download](https://developer.apple.com/safari/resources/) for macOS Sonoma and macOS Ventura. 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: [269634@main…270233@main](https://github.com/WebKit/WebKit/compare/d3a9830bb67830d77bfbb785df77020fc104aef6...cb1d94cd5c9e4d2636f2e11934655dd395302d6d). ### Accessibility #### Resolved Issues - Fixed exposing the correct `

` element role. ([270231@main](https://commits.webkit.org/270231@main)) (13661104) - Fixed slow VoiceOver focus and navigation on extremely long `` or `contenteditable` fields. ([270066@main](https://commits.webkit.org/270066@main)) (117114220) - Fixed Play Animation and Pause Animation animated image context menu items sometimes not appearing after setting toggle. ([269878@main](https://commits.webkit.org/269878@main)) (117215059) - Fixed `<details>` and `<summary>` elements not included in VoiceOver form controls menu or list. ([269643@main](https://commits.webkit.org/269643@main)) (117308226) - Fixed comboboxes not notifying assistive technologies when `aria-activedescendant` changes. ([270182@main](https://commits.webkit.org/270182@main)) (117747058) - Fixed toggling accessibility preferences to correctly update form control appearance. ([270221@main](https://commits.webkit.org/270221@main)) (117914468) ### AutoFill #### Resolved Issues - Fixed clipping the “Strong Password” button after selecting “Suggest New Password”. ([270068@main](https://commits.webkit.org/270068@main)) (113701243) ### CSS #### New Features - Added basic support for `text-wrap: balance` and `text-wrap-style` property. ([269680@main](https://commits.webkit.org/269680@main)) (117336969) #### Resolved Issues - Fixed CSS grid support for last baseline alignment in the column axis for subgrid items with non-orthogonal ancestors. ([269781@main](https://commits.webkit.org/269781@main)) (116484865) - Fixed `text-decoration-thickness` to support percentages. ([269886@main](https://commits.webkit.org/269886@main)) (116985587) - Fixed computing the definite free space of grid rows when the grid has an `aspect-ratio` and definite logical width. ([270098@main](https://commits.webkit.org/270098@main)) (117138268) - Fixed CSS grid to synthesize the central baseline of grid items in the column axis. ([269857@main](https://commits.webkit.org/269857@main)) (117424263) - Fixed serialization for CSS highlight pseudo-elements. ([270146@main](https://commits.webkit.org/270146@main)) (117864974) ### Fonts #### Resolved Issues - Fixed COLRv0 font rendering. ([270167@main](https://commits.webkit.org/270167@main)) (115721319) ### Forms #### Resolved Issues - Fixed `dir=auto` to work for `hidden`, `password`, `submit`, `reset`, and `button` input types, made `dirname` work for `password` and `submit` input types, and removed `dirname` support from `number` input types. ([269711@main](https://commits.webkit.org/269711@main)) (113127508) ### HTML #### New Features - Added support for the `allow-downloads` directive for frames. (109414664) #### Resolved Issues - Fixed `<link rel="stylesheet" disabled>` to fully clear the stylesheet. ([269753@main](https://commits.webkit.org/269753@main)) (114736719) - Fixed the `system-ui` font family within `<canvas>`. (117231545) ### JavaScript #### New Features - Added support for `ArrayBuffer.prototype.transfer`. ([269674@main](https://commits.webkit.org/269674@main)) (117337535) - Aligned the implementation of the internal function IntlMathematicalValue (used in `Number.prototype.toLocaleString`, and `Intl.NumberFormat`) with its current specification. ([269825@main](https://commits.webkit.org/269825@main)) (117535507) #### Resolved Issues - Fixed an edge case in the semantics of `for` loops. ([269653@main](https://commits.webkit.org/269653@main)) (44730906) - Fixed an edge case with detecting a semantic error in generators. ([269801@main](https://commits.webkit.org/269801@main)) (117497786) ### Media #### Resolved Issues - Fixed `canplay` event to fire for video elements where the first sample’s presentation time is slightly greater than 0. ([269689@main](https://commits.webkit.org/269689@main)) (105169372) - Fixed WebVTT to treat negative percentages as invalid values. ([269882@main](https://commits.webkit.org/269882@main)) (117615681) ### Rendering #### Resolved Issues - Fixed a bug where swapping to Safari from another app (or tab) would flash black. ([269776@main](https://commits.webkit.org/269776@main)) (116530284) - Fixed a bug where the returned transform from `getComputedStyle` was incorrect. ([269920@main](https://commits.webkit.org/269920@main)) (117523629) ### Scrolling #### Resolved Issues - Fixed scrolling on nested `pointer-events: auto` inside `pointer-events: none`. ([270094@main](https://commits.webkit.org/270094@main)) (110954175) ### SVG #### Resolved Issues - Fixed the motion path anchor point used for SVG when the `transform-box` is not the `view-box`. ([269642@main](https://commits.webkit.org/269642@main)) (108285569) - Fixed: Added `strokeContains` optimization. ([269745@main](https://commits.webkit.org/269745@main)) (117439322) ### URLs #### Resolved Issues - Fixed CSS invoked URL parsing to always use UTF-8 as agreed by the W3C CSS WG. ([270169@main](https://commits.webkit.org/270169@main)) (114889625) ### Web API #### Resolved Issues - Fixed `showPicker()` method to trigger suggestions from a `datalist`. ([269981@main](https://commits.webkit.org/269981@main)) (116017782) - Fixed declarative shadow trees to match the latest specifications. ([269976@main](https://commits.webkit.org/269976@main)) (117655691) - Fixed jiggling caused by repeated calls to `scrollIntoView({ block: 'center' })`. ([270160@main](https://commits.webkit.org/270160@main)) (117755250) ### Web Inspector #### Resolved Issues - Fixed file drag-and-drop behavior in the Network tab. ([270108@main](https://commits.webkit.org/270108@main)) (114311077) ### WebGL #### Resolved Issues - Fixed Canvas WebGL context capture to WebCodecsVideoFrame not capturing all frames. ([269757@main](https://commits.webkit.org/269757@main)) (108459224) - Fixed: Improved performance of MSAA rendering, including antialiased default framebuffer and fixed PBO uploads of PVRTC1 textures. ([269810@main](https://commits.webkit.org/269810@main)) (117461678) --- 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)