Platform/2023PlannedWork

Gecko Planned Work For 2023

Note: This page may have in-progress sections.

Related Links:

• Firefox Release Calendar (thru 2023)
• Firefox release notes for developers (past)
• Pocket Guide: Shipping Firefox

These are areas of planned work for Gecko in 2023. For current areas of planned work, see:

• Platform

For current web platform documentation of these areas, see the subsections at:

• https://developer.mozilla.org/en-US/docs/Web/

HTML

• autocapitalize attribute (1692007)
• dirname attribute on input & textarea (675943)
• inert attribute (1764263)
• <iframe> loading attribute and HTMLIFrameElement.loading (1622090)
• media attribute on <source> elements within <audio>, <video>, <picture> (1836128)
• rel=modulepreload (1425310
• <search> element (1824121)
• translate attribute (1418449)

ARIA

• image role alias for img (1829269)

CSS

• animation-composition property (1293490, 1823862)
• attr() function fallback value (1448248)
• calc() support infinity and NaN constants (1830759)
• Color functions: color(), lab() and lch(), oklab() and oklch() (meta 1293490)
• color-gamut (1422237)
• Constructable Stylesheets (meta 1520690)
• Container Queries (meta 1744221)
• contain-intrinsic-size: auto none (1835813)
• content property support all image types including <gradient>, image-set(), url(). (1684958)
• content-visibility property (meta 1660384)
• CSS Nesting module and & nesting selector (1835066, 1840781)
• font-size-adjust:from-font (1708240)
• font-synthesis-position property and font-synthesis:position 1849010)
• :has pseudo-class selector (meta 418039)
• @import supports() function supports-conditions feature (1830779)
• :lang() pseudo-class support string-matching semantics (including * wildcards) for matching language codes and comma-separated lists of languages (1121792)
• light-dark() function (1856999)
• lh and rlh line height units (1310170)
• math functions: abs(), sign(), round(), mod(), rem(), pow(), sqrt(), hypot(), log(), exp() (1814589)
• math-style, math-depth properties, and font-size:math (1845516).
• Nesting Module (1648037)
• :nth-child selector supports children based on An+B rule that also matches a defined selector. See (1808229)
• offset-path property syntax updates (1598156, 1837305)
• @page named pages with page property (1787947)
• scripting media feature support (1166581)
• system-color values Mark, MarkText, and ButtonBorder (1638052)
• text-indent values each-line and hanging, and multiple values (784648)
• text-wrap values balance and stable (1731541)
• transform-box values content-box, stroke-box (1819464)
• -webkit-text-security property (1826629)

SVG

• context-stroke and context-fill values inside <marker> (752638)
• crossorigin attribute support in <image> and <feImage> (1240357)
• q unit (1836995)
• <length> CSS Level 3 data types for all SVG attributes that accept a length value (1287054)
• <script> element with type="module", defer, and async attributes in inline SVGs (1839954)

JS

• Array.fromAsync() (1795816)
• Array.toReversed() .toSorted() .toSpliced() .with(), TypedArrays.toReversed() .toSorted() .with() (1811057)
• CanvasRenderingContext2D.reset() (1709347)
• Compression Streams API, including compress and decompress data using the gzip and deflate formats (1823619)
• Date.parse() additional date formats (1557650, 449921, 1852422, 1858851, 1863489, 1863125, 1617562,)
• Intl.NumberFormat constructor options roundingIncrement, roundingMode, roundingPriority, trailingZeroDisplay, useGrouping, and methods formatRange() & formatRangeToParts() (1795756)
• Intl.PluralRules constructor options roundingIncrement, roundingMode, roundingPriority, trailingZeroDisplay, and the selectRange() method (1795756)
• Map.groupBy() (1792650)
• Object.groupBy() (1792650)
• OffscreenCanvasRenderingContext2D.reset() (1709347)
• Promise.withResolvers() static method, resolve and reject callback functions in same scope as returned Promise (1845586)
• String.prototype.isWellFormed() and String.prototype.toWellFormed() (1850755)
• Workers support loading ECMAScript modules. (1812591)
• Worklets support import to statically import ECMAscript/JavaScript modules (1812591)

APIs

• AuthenticatorAttestationResponse: getAuthenticatorData(), getPublicKeyAlgorithm(), getPublicKey() methods (1816519, 1816520)
• CanvasRenderingContext2D.getContextAttributes() (1517786)
• Credential Properties Extension (credProps) of the Web Authentication API (1844437)
• CSSImportRule.supportsText support getting any supports() conditions specified using @import (1829590)
• getAutoplayPolicy() (1773551)
• getDirectory() for OPFS with File System Access API (1785123)
• roundRect() (1756175)
• Compression Streams (1823619)
• MediaDevices.selectAudioOutput(), MediaDevices.enumerateDevices(), HTMLMediaElement.setSinkId(), HTMLMediaElement.sinkId, and Permissions-Policy: speaker-selection (1498512)
• Navigator.userActivation property and UserActivation interface (1791079)
• Opaque Response Blocking (ORB, 1532642)
• PublicKeyCredential.authenticatorAttachment property (1810851)
• PublicKeyCredential: parseCreationOptionsFromJSON(), parseRequestOptionsFromJSON(), toJSON() methods (1823782)
• ReadableStream.from() 1772772
• Response: json() static method (1758943)
• RTCRtpScriptTransform, RTCRtpScriptTransformer, RTCRtpSender.transform, RTCRtpReceiver.transform, RTCEncodedVideoFrame, RTCEncodedAudioFrame, and the RTCTransformEvent and worker rtctransform event (1631263)
• RTCRtpTransceiver.currentDirection and RTCRtpTransceiver.direction properties support "stopped" value (1568296)
• sendOrder property inside options to WebTransport.createBidirectionalStream() WebTransport.createUnidirectionalStream() (1816925)
• TextMetrics.emHeightDescent and TextMetrics.emHeightAscent properties (1841692)
• URL.canParse() (1823354)
• URLSearchParams.has() and URLSearchParams.delete() methods support optional value argument (1831587)
• Web Authentication API minPinLength (1844450)
• WebTransport API (1692754, 1818754, 1791835)
• WebTransportSendStream.sendOrder property (1853444)
• Window.print() print dialog on Android, to print current document (1809922)

DOM

• CSSContainerRule (1787173)
• HTMLInputElement.showPicker() support <input type="week"> and <input type="month"> (1853797)
• scrollend events (1797013, 1803435)
• TextMetrics.fontBoundingBox* (1102584)
• TextMetrics.fontBoundingBoxAscent and TextMetrics.fontBoundingBoxDescent (1801198)

WebRTC

• RTCRtpSender.getCapabilities() (1531460)
• RTCRtpReceiver.getCapabilities() (1531461)
• RTCRtpSender.setStreams() (1510802)
• RTCSctpTransport, RTCPeerConnection.sctp (1278299)
• RTCMediaSourceStats (1804678)
• RTCPeerConnection.connectionState (1265827)
• RTCPeerConnectionStats (1265827)
• RTCRtpReceiver.jitterBufferTarget (1592988)

HTTP

• 103 Early Hints response status code (1858712)
• CSP 'unsafe-hashes' value for source directives (1343950), specifying external JavaScript files to be whitelisted using hashes (1409200)
• Cross-Origin-Embedder-Policy HTTP response header credentialless directive (1851467)
• Permissions-Policy header publickey-credentials-get directive (1460986)
• Range header is a CORS-safelisted request header when the value is a single byte range (1733981)
• Sec-GPC HTTP request header along with Navigator.globalPrivacyControl and WorkerNavigator.globalPrivacyControl properties (1856029)
• Sec-Purpose HTTP header included in requests to Prefetch resources (1836328)

Media

• AV1 video codec support on Android with hardware accelerated decoding if available (1672276)

See Also

• Platform
• Platform/Planning
• Platform/2022PlannedWork