---
title: Safari Technology Preview 199 Release Notes
framework: safari-technology-preview-release-notes
role: article
role_heading: Article
path: safari-technology-preview-release-notes/stp-release-199
---

# Safari Technology Preview 199 Release Notes

Learn about the latest web technology updates in Safari Technology Preview: Apple Pay, CSS, Editing, JavaScript, Media, Rendering, Text, and WebRTC.

## Overview

Overview Safari Technology Preview Release 199 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: 280287@main…280674@main. Apple Pay Resolved Issues Fixed arbitrary 8 digit limit on a line item’s total amount. (280584@main)  (112078798) CSS New Features Added support for (prefers-contrast: custom). (280383@main)  (103658875) Resolved Issues Fixed computed values for text-box-edge. (280413@main)  (117643064) Fixed: Improved large Grid performance. (280473@main)  (130728344) Editing Resolved Issues Fixed an issue where input method editing would sporadically drop the composition range. (280291@main)  (130020224) JavaScript New Features Added support for Uint8Array.prototype.toBase64 and Uint8Array.prototype.toHex. (280654@main)  (129045737) Resolved Issues Fixed Intl.DurationFormat for numeric and 2-digit. (280460@main)  (130279541) Media Resolved Issues Fixed missing picture-in-picture when leaving Safari with picture-in-picture enabled from video viewer. (279877@main)  (124376686) Fixed a hang in WebAudio. (280604@main)  (130531570) Rendering Resolved Issues Fixed support for border, padding, and margin on mfrac and mspace elements in MathML. (280665@main)  (131119823) Text Resolved Issues Fixed disclosure counter styles to consider writing-mode. (280433@main)  (130468537) WebRTC Resolved Issues Fixed RTCAudioPlayoutStats to match web specifications. (280461@main)  (130767124)

## 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 205 Release Notes](safari-technology-preview-release-notes/stp-release-205.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 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)