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WebKit is the browser engine used by Safari, Mail, the App Store and many other apps on macOS, iOS and Linux. Get started contributing code, or reporting bugs.

What is new

Note: Shared tab groups and synchronization for tab groups, site settings, and web extensions are not enabled in this release.

Web inspector

Items tab

• Changed to grayscale nodes in DOM tree not rendering (252653@main)
• Rearranged Gradient Editor to be able to display the color component input fields (252971@main)

Sources tab

• Added capture of asynchronous stack traces for queueMicrotask (252543@main)
• Expanded all existing sync stack traces to also show related async stack traces (252630@main)
• Excluded internal functions from all stack traces (252914@main)

Network tab

• Changed the Initiator column to appear by default (252435@main)
• Added a path column (252827@main)
• Added ability for the shift key to highlight resources initiated by the pointing resource (252489@main)
• Added an experimental feature to limit download speed by bytes per second for network tasks (252589@main)

WebDriver

• Added support for “Get Element Shadow Root”, “Find Element From Shadow Root” and “Find Elements From Shadow Root” commands

CSS

• Enabled support for color-mix() function (252716@main)
• Enabled support for specifying the interpolation color space in CSS gradients (252716@main)
• Added support for the scan media query (252717@main)
• Added a basic implementation of :dir (252737@main)
• Disallow content property on video element (252574@main)
• Fixed not using aspect ratio if a grid element’s percentage width is resolvable (252819@main)
• Fixed securing a containing block of a blockbox with height: fill-available is also fill-available considered resolved (252470@main)
• Fixed table edge radius to be used when the border color is transparent or semi-transparent (252741@main)
• Fixed blocks with non-visible overflow to clip fixed descendants correctly (252721@main)
• Fixed visibility: hide to use on Flexbox (252997@main)

Rendering

Media

• Added support for legacy VP8 and VP9 codec names (252535@main)
• Added missing default CSS style for text and background colors for WebVTT (252464@main)
• Changed to not cancel due to invisible autoplay if HTMLMediaElement is paused (252735@main)
• Fixed WebRTC calls without microphone recording being permanently muted by AudioSession interrupts like Siri (252907@main)
• Fixed video-as-img losing alpha channel (252836@main)
• Fixed muting microphone recording if starting recording fails due to a low priority error (252642@main)
• Fixed not restarting program muted mic tracks in case of audio device being disabled (252905@main)
• Fixed RTCDtlsTransport to close when peer connection is closed (252948@main)
• Fixed Canvas.getContext(‘2d’).drawImage on a camera video stream when tab has background (252738@main)

JavaScript

• Fixed Temporal.Duration#toString to use BigInt#toString for values ​​beyond MAX_SAFE_INTEGER (Behind the –useTemporal flag) (252935@main)
• Improved TypedArray.from performance (252976@main)
• Improved TypedArray#indexOf and TypedArray#include performance (252945@main, 252544@main)
• Removed order check for range functions Intl.NumberFormat, Intl.DateTimeFormat and Intl.PluralRules (252911@main)
• Improved TypedArray#toSorted, TypedArray#toReversed, TypedArray#with and TypedArray#subarray (252911@main)
• Improved TypedArray#slice performance (252847@main)
• Removed TypedArray#toSpliced ​​since it was deleted from the proposal (252664@main)
• Fixed generic iterator protocol function being invisible to Functions caller getter (252578@main)

Web API

element (252992@main)

• Adjusted StorageEvent.initStorageEvent() with the HTML spec (252521@main)
• Adjusted XHR breaks with the spec (252611@main)
• Changed to not perform smooth keyboard scrolling on containers with scroll snap (252663@main)
• Changed to maintain original Content-Type header on 303 HTTP redirect (252713@main)
• Checked for strictly dynamic when checking host sources for CSP (252465@main)
• Enabled lazy iframe loading by default (252848@main)
• Exposed sheet property on SVGStyleElement (252491@main)
• Fixed alternative style sheets not found in document.styleSheets (252781@main)
• Fixed CSS.supports returning false for custom properties (252987@main)
• Fixed a display: no HTMLMediaElement with a camera track as source leaking video frames (252871@main)
• Fixed getComputedStyle(img).height to return a string with a rounded int, not a float (252583@main)
• Fixed a visible line character in the space between paragraphs when using double space while composing an email with Gmail in Safari (252683@main)
• Fixed XHR error events to return zeros for loaded and total (252743@main)
• Fixed password authentication in XHR (252696@main)
• Fixed canvas drawImage to clip source image when source rectangle is outside source image (252731@main)
• Fixed dynamically inserted stylesheets to be available via document.styleSheets (252816@main)
• Fixed link elements to be able to trigger more than one load or error event (252943@main)
• Fixed attributes for parsing link, vlink and alink content on
• Fixed SVGDocument getElementById returning null when an SVG element is unlinked from documents (252478@main)
• Fixed when a WebLock is aborted via a signal to reject the promise with the AbortSignal’s reason (252503@main)
• Fixed Service Workers in browser extensions to be able to load resources over a custom protocol (252585@main)
• Fixed WorkerGlobalScope.isSecureContext to be based on owner’s top URL, not owner’s URL (252913@main)
• Adjusted CSS.support with spec to return false for descriptors (252720@main)
• Implemented fingerprint countermeasures to query the permission state of the Notifications API (252969@main)
• Stopped allowing trailing garbage when parsing attempt delay for EventSource (252885@main)
• Fixed parsing of deeply nested phrasing content (252979@main)
• Fixed removing srcdoc content attribute not unloading document in iframe (252991@main)

Web components

• Updated shadow DOM and dialog element with focus to latest spec (252959@main)
• Updated delegatesFocus to match the latest spec (252901@main)
• Fixed custom callback timing for element reaction when changing ARIA attributes (252552@main)
• Fixed custom element reaction callback timing using WebAnimation.prototype.commitStyles (252553@main)

availability

• Exposed proposals, insertion, deletion roles and attributes (252516@main)
• Enabled ARIA reflection attributes referencing elements (252590@main)

Lock mode

• Disabled web fonts in lock mode (252884@main, 252712@main)

Web extensions

• Added browser.storage.session API for storing data in memory that is not written to disk