Safari Technology Preview 205 Now Available – Brings Bug Fixes and Performance Bumps

Apple has released Safari Technology Preview 205, the latest version of their developer preview web browser. The preview version of Apple’s popular browser offers developers and other interested users the ability to try out features that may or may not, debut in future public release versions of Safari.

Safari Technology Preview‌ 205 includes fixes and updates for CSS, HTML, JavaScript, Lockdown Mode, SVG, Tables, Text, Web API, Web Driver, Web Extensions, and WebAssembly.

The current ‌Safari Technology Preview‌ release is compatible with machines macOS Sonoma and the macOS Sequoia beta, the newest version of macOS that is currently in beta testing.

Overview

Safari Technology Preview Release 205 is now available for download for macOS Sequoia beta and macOS Sonoma. 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: 283688@main…284049@main.

CSS

New Features

• Added support for text-wrap: pretty. (283768@main) (136139920)

HTML

Resolved Issues

• Fixed adding an unexpected download failure when no placeholder URL is provided. (284157@main) (136378962)

JavaScript

New Features

• Added support for Math.sumPrecise. (283774@main) (131580043)
• Added support for Iterator.prototype.reduce. (283697@main) (136064316)

Resolved Issues

• Fixed: Updated Intl.DurationFormat#resolvedOptions to the latest specification. (283901@main) (136276429)
• Fixed Iterator Helpers methods to not iterate an array. (283933@main) (136303997)

Lockdown Mode

New Features

• Enabled Lockdown Mode Safe Fonts to try parsing web fonts with a safe font parser in Lockdown Mode. While the safe parser is enabled the list of allowed fonts won’t be used. (283951@main) (125621507)

SVG

Deprecations

• Removed the SVG 1.1 kerning property. (283718@main) (116965514)

Tables

Resolved Issues

• Fixed table row direction to be determined by the table’s direction, not the section. (283875@main) (99343532)

Text

Resolved Issues

• Fixed: The changes for GB18030-2022 now properly impact GBK as well, as required by the Encoding Standard. (283987@main) (136368583)

Web API

Resolved Issues

• Fixed the onrejectionhandled and onunhandledrejection event handler attributes to work correctly on body and frameset elements. (283698@main) (135401362)

Web Driver

Resolved Issues

• Fixed chorded mouse interactions by ensuring input dispatch logic correctly interprets successive mousepress or mouserelease actions with different button values. (283790@main) (128669517)

Web Extensions

Resolved Issues

• Fixed an issue to restore lost Safari Web Extension data. (136159837)

WebAssembly

New Features

• Added support for the new Wasm Exception Specification. (283954@main) (131409318)

While the preview is intended for use by developers and advanced users, to provide Apple with feedback on the development of the Safari browser, it can be run side-by-side with the release version of Safari. The app doesn’t require a developer account to download and install. For more information, visit the Safari Technology Preview website.