Web Inspector

• Graphics Tab
  • Added showing color space for canvases in the Graphics tab on the overview cards (r283572)
• Styles Tab
  • Changed to format style declarations after editing (r283723)
• Other
  • Added context menu support for the tab content view (r283859, r283921)

CSS

• Unprefixed -webkit-appearance and added support for the auto value (r283858, r284098)
• Added support for the x resolution unit outside of image-set (r282396)
• Added support for text-decoration-skip-ink (r282397)
• Changed to consider overflow-wrap: anywhere when calculating min-content intrinsic sizes (r283493)
• Fixed computed style for transform-origin on SVG boxes (r282379)
• Fixed overflow to be computed with the actual logical bottom in CSS Grid (r282463)
• Fixed RTL for an out of flow child in CSS Grid (r282340)
• Fixed SVG linear gradients getting drawn incorrectly sometimes (r282443)
• Fixed radial-gradient to accept calc() values that combine length and percent (r283561)
• Implemented exp, and log functions in calc functions (r282795)
• Implemented allowing NaN, infinity, and -infinity in calc (r283434)
• Implemented atan, acos, asin, atan2 in calc functions (r283013)
• Updated CSS Cascade Layers with recent spec change: unlayered styles are highest priority (r284182)
• Updated transform-origin to not accept four lengths (r282359)

CSS Font Loading API

• Updated the implementation of the CSS Font Loading API to be closer to the spec and other browsers:
• Fixed CSSFontFaceSrcValue.cssText to be quoted consistently with other browsers (r282442)

Scrolling

• Enabled support for ScrollOptions’ ScrollBehavior and CSS scroll-behavior properties (r284029)
• Moved smooth scroll animations to run on the scrolling thread (r283871)
• Fixed scrollIntoView to not take into account sticky positioning offsets (r283546)
• Fixed properly redrawing a sticky element inside another sticky element on scroll (r284084)

Rendering

• Enabled 2D canvas color space support on Apple platforms (r283541)
• Updated converting an SVG image for canvas drawImage to choose an appropriate color space (r283531)

Dialog Element

• The <dialog> element is now enabled by default (r284155), also including:
  • support for the CSS ::backdrop pseudo element
  • support for the top layer
  • <form method="dialog"> support
• The inert attribute is available for testing behind an experimental flag with the same name

WebAssembly

• Allowed WASM to use up to 4GB (r284330)
• Implemented the WebAssembly exception handling proposal (r283852)

JavaScript

• Enabled unlinked Baseline JIT for performance (r283139)
• Fixed Intl.DateTimeFormat#resolvedOptions not to return detailed information of formatting if dateStyle or timeStyle is set (r283460)
• Fixed Intl.supportedValuesOf to populate emoji and eor for collation (r282897)
• Fixed syntactic production for #x in expr (r282968)
• Optimized JSON.parse object creation (r282468)
• Optimized put-by-val with for-in (r283098)
• Optimized JSON.stringify property enumeration (r282707)
• Refined RegExp#compile based on regexp-legacy-features proposal (r283874)

Web API

• Enabled BroadcastChannel (r282426)
  • Implemented top-origin and frame-origin partitioning for BroadcastChannel (r282366)
• Enabled Storage API by default (r284273)
• Enabled FileSystemAccess and AccessHandle by default (r284131)
  • Implemented FileSystemSyncAccessHandle read() and write() (r284059)
• Implemented the borderBoxSize and contentBoxSize parts of ResizeObserver (r282441)
• Implemented CSP script-src-elem, style-src-elem, script-src-attr and style-src-attr directives (r284254)
• Cached Web Audio PannerNode’s azimuth, elevation, and coneGain for performance (r283740)
• Changed <model> to be draggable, similar to <img> (r283563)
• Updated the autofocus attribute behavior to match the latest specification (r283935)
• Updated to preserve color space when creating ImageBuffers for ImageBitmaps (r282696)

WebGL

• Fixed image-rendering: crisp-edges for WebGL canvases (r282335)

Media

• Fixed the progress bar moving when playback stops (r282374)
• Fixed createImageBitmap using a HLS video as source always returning a black image (r283585)

WebRTC

• Added support for WebRTC media capabilities (r284085, r284236)
• Changed MediaCapabilities to enqueue a task to resolve promises (r284236)

Accessibility

• Exposed the URL attribute of <video> elements (r283799)
• Made PDFs loaded via <embed> accessible (r282358)
• Updated role="math" elements to no longer be considered to have presentational children (r284246)

Private Click Measurement

• Allowed measurement of links in nested, cross-site iframes (r283593)

Web Extensions

• Allowed more directives to be included in the content_security_policy of an extension’s manifest, such as the sandbox directive