Accessibility

Resolved Issues

• Fixed VoiceOver’s “Skip redundant labels” setting not being respected on certain web pages. (312967@main) (176297111)

CSS

New Features

• Added support for the case-sensitive modifier s in CSS attribute selectors. (313234@main) (126331481)
• Added support for the :host:has() compound selector in CSS. (313350@main) (139799278)

Resolved Issues

• Fixed aspect-ratio not being respected on flex children when the flex container has position: absolute. (313213@main) (117807518)
• Fixed aspect-ratio not working correctly on flex children that also have overflow set. (313170@main) (118926827)
• Fixed image aspect-ratio not being preserved when width: 100% and height: 100% are set but no ancestor has a defined width. (313003@main) (162373271)
• Fixed transferred min/max block-size constraints not being applied for intrinsic keyword widths on replaced elements. (313091@main) (173128588)
• Fixed serialization of multi-word font family names that were always incorrectly quoted due to treating the full string as a single identifier. (313271@main) (175522811)
• Fixed CSSStyleDeclaration.setProperty() failing to apply !important priority to an existing inline style property when the value was an integer of 255 or lower. (313159@main) (176099619)
• Fixed an issue where elements using stretch sizing inside anonymous block wrappers resolved to their intrinsic size instead of stretching to fill the available space. (313359@main) (176398251)
• Fixed :has() style invalidation failing in complex nested cases involving :is(). (312966@main) (176719780)
• Fixed -webkit-perspective not establishing a containing block for fixed-positioned descendants. (313020@main) (176729670)
• Fixed nested multi-column layouts with three or more levels failing to paginate content across pages. (312973@main) (176741498)
• Fixed :has() selector performance by using scope selectors to limit style invalidation traversal for class, attribute, and pseudo-class changes. (313009@main) (176771971)
• Fixed non-replaced blocks with aspect-ratio and a percentage max-width collapsing to zero width during intrinsic sizing. (313074@main) (176873776)
• Fixed percentage max-width on elements with aspect-ratio resolving against the wrong axis in perpendicular writing modes. (313078@main) (176879597)
• Fixed z-index not applying to statically-positioned display: -webkit-box items to align with Firefox and Chrome behavior. (313081@main) (176886461)
• Fixed flex containers using box-sizing: border-box providing the wrong cross size to stretched flex items. (313175@main) (176989934)
• Fixed flex containers with aspect-ratio-derived height not providing a definite cross size to their flex items. (313256@main) (177085129)
• Fixed SVG images with no intrinsic dimensions collapsing to zero height inside column flex containers. (313257@main) (177086497)

Editing

Resolved Issues

• Fixed a regression where Vietnamese and Korean keyboard input methods incorrectly exited modeless composition mode, requiring a double spacebar press to complete each word. (313286@main) (176847897)
• Fixed a recent regression that “Zhuyin – Traditional” input method stalling for multiple seconds when composing Chinese text. (313336@main) (177042301)

HTML

Resolved Issues

• Fixed a severe performance regression causing dynamic insertion of <img> elements with a src attribute to be dramatically slower than other browsers. (313268@main) (166201075)
• Fixed nested calls to requestClose() incorrectly firing multiple cancel events and causing a stack overflow. (313239@main) (174850509)
• Fixed requestClose() incorrectly removing the open attribute when called on a disconnected dialog element. (313251@main) (174855725)
• Fixed <a rel="ar"> elements wrapping <model> elements to correctly enter ARQL without extra steps and to display the AR badge. (313047@main) (176410897)
• Fixed the HTML preload scanner not preloading resources referenced by legacy <image> tags. (312984@main) (176712749)

Images

Resolved Issues

• Fixed rendering performance of HDR images that have gain-maps by using GPU-backed surfaces. (313339@main) (176605566)

JavaScript

New Features

• Added support for static import defer semantics. (313139@main) (176568369)

Resolved Issues

• Fixed the Array ToPrimitive fast path incorrectly ignoring overrides of Object.prototype.valueOf. (313028@main) (175122250)
• Fixed input position corruption in regular expression backward matching when rewinding over a surrogate pair. (313026@main) (175122467)

MathML

New Features

• Added support for operator dictionary entries for multi-character operators to align with the MathML Core specification. (313083@main) (176543727)

Resolved Issues

• Fixed the MathML operator dictionary to correct the stretchy property for several operators, resolving Web Platform Test failures. (312993@main) (170901728)
• Fixed spacing values for prefix operators +, −, ±, ∓, ∇, and infix operator ⋉ in the MathML Core operator dictionary. (312999@main) (176652211)
• Fixed the operator dictionary entry for the ∂ prefix operator to use the correct spacing values (3, 0) instead of (2, 1). (312997@main) (176693587)
• Fixed nonce-hiding support for MathML elements to align with the HTML specification. (313075@main) (176875058)

Media

Resolved Issues

• Fixed timeupdate events being fired during seeking before the seek operation completes. (313165@main) (176861767)
• Fixed the ended event not always firing when the MediaSource duration is changed to match the current playback position. (313141@main) (176863546)
• Fixed a MediaSource issue where the decode-key cleanup in coded frame processing was incorrectly removing non-orphaned samples. (313296@main) (176971800)
• Fixed currentTime() returning a stale value after the playback rate was changed from zero to a non-zero value. (313249@main) (177046564)

Rendering

Resolved Issues

• Fixed an issue where a child element with filter: blur() ignored border-radius overflow clipping from its parent. (312531@main) (175519148)
• Fixed drop-shadow filters and transform: translate() incorrectly clipping nested elements after a regression. (313316@main) (175905543)
• Fixed a repaint issue where table rows did not repaint their previous position after a preceding row changed size, causing content to appear at both the old and new locations. (313168@main) (176172404)

SVG

Resolved Issues

• Fixed negative stroke-dashoffset values rendering with incorrect offsets when stroke-dasharray has an odd number of values. (313353@main) (103596361)
• Fixed an issue where @prefers-color-scheme in an SVG image will sometimes not follow the system color appearance. (313021@main) (176413340)
• Fixed getScreenCTM() returning an incorrect matrix when the document is scrolled under a CSS-transformed ancestor. (313111@main) (176814876)

Web API

Resolved Issues

• Fixed missing custom element callbacks for the role attribute. (312976@main) (176713992)
• Fixed incorrect URL parser invocation on the Notification object. (312988@main) (176762955)
• Fixed requestAnimationFrame() not providing sub-millisecond timestamp precision in cross-origin isolated contexts. (313153@main) (176967366)

Web Extensions

Resolved Issues

• Fixed cross-origin XMLHttpRequest incorrectly triggering additional Web Extension permission requests. (313506@main) (154866064)
• Fixed loading Web Extensions breaking Cloudflare bot challenge pages. (313007@main) (176618014)

Web Inspector

New Features

• Added unique colors for style events such as “Style Invalidated” and “Style Recalculated” in the Timeline view to distinguish them from layout events. (312995@main) (176770197)

WebGPU

Resolved Issues

• Fixed a WGSL shader validation failure in binary arithmetic expressions. (313135@main) (176473479)

WebRTC

Resolved Issues

• Fixed outgoing video feeds freezing when the Safari window is obscured by another window while a virtual background is active. (312990@main) (170720729)
• Fixed screen sharing via getDisplayMedia() starting at extremely low quality and taking up to 30 seconds to become legible for remote participants. (313072@main) (175425085)