Release Notes for Safari Technology Preview 199

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)