---
title: Safari Technology Preview 205 Release Notes
framework: safari-technology-preview-release-notes
role: article
role_heading: Article
path: safari-technology-preview-release-notes/stp-release-205
---

# Safari Technology Preview 205 Release Notes

Learn about the latest web technology updates in Safari Technology Preview: CSS, HTML, JavaScript, Lockdown Mode, SVG, Tables, Text, Web API, Web Driver, Web Extensions, and WebAssembly.

## Overview

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. 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)

## See Also

### 2024

- [Safari Technology Preview 210 Release Notes](safari-technology-preview-release-notes/stp-release-210.md)
- [Safari Technology Preview 209 Release Notes](safari-technology-preview-release-notes/stp-release-209.md)
- [Safari Technology Preview 208 Release Notes](safari-technology-preview-release-notes/stp-release-208.md)
- [Safari Technology Preview 207 Release Notes](safari-technology-preview-release-notes/stp-release-207.md)
- [Safari Technology Preview 206 Release Notes](safari-technology-preview-release-notes/stp-release-206.md)
- [Safari Technology Preview 204 Release Notes](safari-technology-preview-release-notes/stp-release-204.md)
- [Safari Technology Preview 203 Release Notes](safari-technology-preview-release-notes/stp-release-203.md)
- [Safari Technology Preview 202 Release Notes](safari-technology-preview-release-notes/stp-release-202.md)
- [Safari Technology Preview 201 Release Notes](safari-technology-preview-release-notes/stp-release-201.md)
- [Safari Technology Preview 200 Release Notes](safari-technology-preview-release-notes/stp-release-200.md)
- [Safari Technology Preview 199 Release Notes](safari-technology-preview-release-notes/stp-release-199.md)
- [Safari Technology Preview 198 Release Notes](safari-technology-preview-release-notes/stp-release-198.md)
- [Safari Technology Preview 197 Release Notes](safari-technology-preview-release-notes/stp-release-197.md)
- [Safari Technology Preview 196 Release Notes](safari-technology-preview-release-notes/stp-release-196.md)
- [Safari Technology Preview 195 Release Notes](safari-technology-preview-release-notes/stp-release-195.md)