Safari Technology Preview 104 Offers The Usual Bug Fixes and Performance Improvements

Apple on Wednesday released Safari Technology Preview 104, 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.

Release 104

Web Inspector

Elements

Created a visual editor for box-shadow

Network

Change “Preserve Log” to be the last navigation item to be hidden at small widths

Ensure that the method is escaped when using “Copy as cURL”

Sources

If the hovered object is a DOM node, highlight it when hovering the title in the object preview popup

Storage

Added support for editing cookies

Console

Show logs for Intelligent Tracking Prevention Debug Mode and Ad Click Attribution Debug Mode in the Console

Added a console message when legacy TLS is used

Miscellaneous

Added a new WebSocket icon

Added the keyboard shortcut for showing the Search Tab and Settings Tab to the titles of their respective tab tab items

Fixed a bug where the tab bar thought it was too wide causing a tab bar item to be hidden

Fixed a bug where the currently focused node was changed when detaching into a separate window

Prevent disabled buttons from being focusable

Web API

Added HTTP3 as an experimental feature

Avoided querying pasteboard strings while dragging content over a potential drop target

Added label text to suggested values for a <datalist> element

Fixed <datalist> dropdown suggestions table able to be scrolled too far

Fixed a change event getting dispatched when a <textarea> gets changed without focus

Fixed event listeners registered with the once option that get garbage collected too soon

Fixed the name of X-Content-Type HTTP header in console logging

Fixed a bug that could cause elements to disappear with combinations of transforms and overflow

Fixed function passed to addEventListener may get garbage collected before the event listener is even added

Prevented Force Touch preview on file:/// URL works while clicking on the URL is blocked

Removed synchronous termination of service workers

Sanitized the suggested download filename

Updated Intl.NumberFormat.prototype.format to preserve a sign of -0

Updated to make sure a preflight fails if response headers are invalid

Updated to consider the referrer-policy in the append Origin header algorithm

CSS

Add support for :is()

Fixed changes in grid or elements inside the grid affecting margin on other elements in the grid

Web Animations

Marked promises as handled when rejected

Fixed onwebkit{animation, transition}XX handlers missing from Document

Intersection Observer

Fixed Intersection Observer intersections when zoomed in

Media

Changed HTMLTrackElement to be pending while it is waiting for LoadableTextTrack request

Fixed animated PNG issue where it would play the frames one time more than the image loopCount

WebRTC

Added initial support for WebRTC HEVC

Applied video rotation at the source level if WebRTC sink ask so

Fixed RTCRtpSender of kind video to have a null dtmf attribute

Fixed audio failing to capture stream if the AudioSession gets interrupted

Replaced the host candidate IP address in SDP with the corresponding mDNS name

Supported inserting text or dictation alternative by simulating keyboard input

Supported resolution of IPv6 STUN/TURN addresses

WebAuthn

Improved title and text used in prompts

Bug Fixes

Fixed getting stuck in a loading state when seeking on hulu.com

Safari extensions

Added support for restoring extension tabs across launches of Safari

The update can be downloaded from the Safari Technology Preview website, or if the browser is already installed, it can be updated via the “Update” tab in the Mac App Store. Full release notes for the update are also available on the Safari Technology Preview website.

While the preview is intended for use by developers and advanced users, in order 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.