Apple has released Safari Technology Preview 199, 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 199 includes fixes and updates for Apple Pay, CSS, Editing, JavaScript, Media, Rendering, and WebRTC.
The current Safari Technology Preview release is compatible with machines macOS Sonoma and the macOS Sequoia beta, the newest version of macOS that Apple is beta testing.
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
Uint8Arrayand.prototype .to Base64 Uint8Array. (280654@main) (129045737).prototype .to Hex Resolved Issues
- Fixed
Intlfor.Duration Format numericand2-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
mfracandmspaceelements in MathML. (280665@main) (131119823)Text
Resolved Issues
- Fixed disclosure counter styles to consider
writing-mode. (280433@main) (130468537)WebRTC
Resolved Issues
- Fixed
RTCAudioto match web specifications. (280461@main) (130767124)Playout Stats
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.
