Apple has released Safari Technology Preview 208, 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 208 includes fixes and updates for CSS, JavaScript, Rendering, Scrolling, Web API, Web Authentication, Web Extensions, Web Inspector, and WebRTC.
The current Safari Technology Preview release is compatible with machines macOS Sonoma and macOS Sequoia, the newest version of macOS.
Overview
Safari Technology Preview Release 208 is now available for download for macOS Sequoia 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: 285487@main…286403@main.
CSS
New Features
- Added
attr()fallback support. (285849@main) (136763160)Resolved Issues
- Fixed combining CSS
clip-pathwith any property that creates a new stacking context makes<img>element disappear. (286172@main) (86091397)- Fixed resize to not be applied to generated content. (285644@main) (121348638)
- Fixed
:invalidation. (285987@main) (122689282)not(: has(...)) - Fixed
@scopestartandendto be a forgiving selector list. (286393@main) (139471866)JavaScript
New Features
- Added support for
Iterator. (285587@main) (138013723).concat - Implemented relaxed laneselect SIMD instructions. (286162@main) (138484223)
- Enabled support for Iterator Helpers. (285734@main) (138520150)
- Added support for
Mapand.prototype .get Or Insert Weak. (286377@main) (138955824)Map..prototype .get Or Insert Rendering
Resolved Issues
- Fixed
<img>element withheight: min-contentgetting streteched vertically. (286284@main) (137063317)- Fixed support for CSS width and height properties on MathML elements. (285892@main) (138174295)
- Fixed Inline content incorrectly positioning around right-to-left and/or vertical
shape-outsidefloats. (286007@main) (139076129)- Fixed incorrectly overlapping when a float has
shape-outside: inset. (286054@main) (139133291)- Fixed right-to-left content failing with a
shape-outsidefloat. (286079@main) (139198865)- Fixed incorrectly overlapping a float that has
shape-outside: ellipsein vertical mode. (286088@main) (139208636)- Fixed incorrectly overlapping a float that has
shape-outside: polygonin right-to-left. (286099@main) (139215719)Scrolling
Resolved Issues
- Fixed scrollbar appearance when the used color scheme changes. (286229@main) (138108344)
Web API
Resolved Issues
- Fixed Gamepad rumble issue where sending two sequential
playrequests preventsEffect() reset()from working as expected. (286286@main) (126589062) (FB13733668)Web Authentication
Resolved Issues
- Fixed
.catch()for conditional mediation not getting passed the abort reason that was thrown. (286208@main) (112178073)Web Extensions
New Features
- Added declarativeNetRequest support for
initiatorandDomains excluded. (286340@main) (97014647) (FB10684115)Initiator Domains - Added support for
unless-frame-urlto content blockers. (286310@main) (139456686)Resolved Issues
- Fixed an issue causing content blockers to not hide content in “about:blank” frames. (286221@main) (134273470)
- Fixed
storagereturning undefined as the.on Changed area. (285510@main) (138086765)Name - Fixed es-419 support in Web Extensions. (285875@main) (138857112)
Web Inspector
Resolved Issues
- Fixed the Elements tab DOM tree view reducing deeply-nested nodes to one character wide. (286163@main) (86833831)
- Fixed error cases to match new source map specification. (285541@main) (137934436)
WebRTC
Resolved Issues
- Fixed voice search to not re-prompt for camera or microphone permission after a page-initiated same origin navigation.(285950@main) (138122655)
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.
