Platform/2024PlannedWork

Gecko Planned Work For 2024

Related Links:

• Firefox release notes for developers (past)
• Pocket Guide: Shipping Firefox

These are areas of planned work for Gecko in 2024. 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

• contenteditable=plaintext-only (1922723)
• fetchpriority attribute of <link>, <script>, <img> (1854077)
• popover, popovertarget, popovertargetaction attributes (1823757, 1866993)
• <hr> in <select> (1830909)
• <meta name="viewport"> support interactive-widget feature (1831649, 1920755)
• <template> supports shadowrootmode attribute (1712140, 1870052, 1880188)

CSS

• Nested declaration rule (1918408)
• Relative color syntax (1900251)
• <color-interpolation-method> is now supported in gradients (1861363)
• :has-slotted pseudo-class (1921747)
• :popover-open pseudo-class
• :state() pseudo-class (1887543)
• ::backdrop pseudo-element supports popovers
• ::target-text pseudo-element - (1914877)
• @property syntax descriptor support <string> syntax (1846635)
• @starting-style - (1834876, 1834877)
• align-content supports display: block layouts (1882853)
• clip-path & offset-path: rect() and xywh() shape functions. (1868722)
• color-interpolation property
• content property support alternative text (1281158, 1896047)
• content-visibility:auto
• hyphens property support Czech and Slovak languages (1908931)
• offset-position (1598152)
• offset-path methods (1598159)
• ray() function (1598151)
• shape() function (1823463, 1884424, 1884425)
• text-emphasis-position: auto (1919658)
• text-wrap: balance
• text-wrap shorthand for text-wrap-mode & text-wrap-style (1758391)
• transform-box: content-box & stroke-box values (1868374)
• transition-behavior: (1882408, 1805727, 1901645)
• zoom (390936)

CSSOM

• CSSNestedDeclarations interface and CSSNestedDeclarations.style property (1918408)
• CSSPropertyRule interface (1864818)
• registerProperty() (1864818)

SVG

• color-interpolation attribute on <linearGradient> & <radialGradient> elements
• stroke-width attribute support for lh & rlh line height units (1892089)
• <text> supports ::first-letter & ::first-line CSS pseudo-elements (1302722)
• ...
• Removed SVGAElement.text property in preference to textContent property
• Removed data: support in <use> element and SVGUseElement (1806964)

DOM

• Clipboard API full support (1887845, 1858788)
  • e.g. dom.events.asyncClipboard (1809106), Clipboard.readText() (1877400),
• clonable support in Element.attachShadow() & ShadowRoot (1868428)
• Document.fragmentDirective – (1914877)
• Element.ariaBrailleLabel & Element.ariaBrailleRoleDescription reflecting global ARIA HTML aria-braillelabel & aria-brailleroledescription attributes
• Element.currentCSSZoom (1880189)
• ElementInternals.states (1887543)
• fetchPriority property of HTMLLinkElement, HTMLScriptElement, HTMLImageElement (1854077)
• HTMLButtonElement popoverTargetElement & popoverTargetAction properties
• HTMLInputElement popoverTargetElement & popoverTargetAction properties
• HTMLElement popover property; hidePopover(), showPopover(), and togglePopover() methods; beforetoggle & toggle_event events (of type ToggleEvent)
• HTMLVideoElement methods requestVideoFrameCallback() & cancelVideoFrameCallback() (1800882, 1919367)
• PopoverInvokerElement (1823757, 1866993)
• Selection.direction (1867058)
• Selection.getComposedRanges() (1867058)
• ShadowRoot.getHTML() and properties ShadowRoot.serializable and HTMLTemplateElement.shadowRootSerializable
• showPicker() (1865207)

JS

• ArrayBuffer resizable, SharedArrayBuffer growable (1884150)
• ArrayBuffer.prototype.transfer() & ArrayBuffer.prototype.transferToFixedLength() (1865103)
• Float16Array typed arrays (1903329)
• Intl.Segmenter (1423593, 1883914)
• Set.prototype methods: intersection(), union(), difference(), symmetricDifference(), isSubsetOf(), isSupersetOf(), isDisjointFrom() (1868423)
• synchronous iterator helper methods on Iterator.prototype - (1896390)
• Uint8Array methods (1862220, 1917885)

APIs

• AbortSignal.any() (1830781)
• Blob.bytes() (1896509)
• CloseWatcher (1888729)
• CookieStore & CookieChangeEvent interfaces, Window.cookieStore & ServiceWorkerGlobalScope.cookieStore properties (1800882)
• IDBFactory.databases() (934640)
• IDBTransaction.durability (1878143)
• JSON.parse with source, JSON.isRawJSON(), JSON.rawJSON() (1913085, 1925334)
• LargestContentfulPaint (1866266)
• MediaStreamTrack.getCapabilities() (1179084)
• navigator.credentials.create supports cross-origin credential creation (1870863)
• Navigator.wakeLock - Screen Wake Lock API (1589554, 1874849)
• Notification.silent (1809028)
• Permissions.query() support microphone & camera permissions (1609427, 1915222)
• PointerEvent properties altitudeAngle & azimuthAngle (1656377)
• Promise.try() (1905364)
• PushMessageData.bytes() (1897871)
• Request.bytes() & Response.bytes() (1896475)
• RTCDTMFSender.canInsertDTMF & RTCDTMFSender.insertDTMF() (1623193)
• RTCIceCandidate properties and methods (1322186)
• RTCRtpReceiver.getParameters() & RTCRtpSender.getParameters() (1534687)
• RTCRtpTransceiver.setCodecPreferences() (1396922)
• URL.parse() (1823354)
• VideoEncoder, VideoDecoder, EncodedVideoChunk, VideoFrame, VideoColorSpace (1874445)
• Web Codecs API support on desktop (1908572)
• Web Crypto API support for Ed25519 (1804788), X25519 (1904836)
• WebGLRenderingContext & WebGL2RenderingContext properties drawingBufferColorSpace (1885491) & unpackColorSpace (1885446)
• WebSocket() constructor supports HTTPS, HTTP, and relative URLs (1797449)
• WorkerNavigator.permissions (1193373)
• ...
• Removed Navigator.vibrate() (1653318, 1623193)

WebDriver BiDi

• browser.createUserContext (1870848)
• browser.removeUserContext (1870849)
• browser.getUserContexts (1870847)
• browsingContext.locateNodes command (1855023, 1869536)
• browsingContext.navigationFailed event (1846601)
• browsingContext.traverseHistory command (1841018)
• input.setFiles command (1855040)
• network.addIntercept command (1826192)
• network.continueResponse command for remaining arguments (1853887, 1913737,
• network.continueRequest, network.continueResponse, network.provideResponse support "request" to resume a blocked request (1874206, 1853882); support url argument (1898158)
• network.continueWithAuth (1826196)
• network.cookie.CHIPS (1898253, 1908160)
• network.failRequest (1853883)
• network.fetchError event (1790375)
• network.removeIntercept command (1826193)
• network.responseCompleted & network.fetchError events (1882803)
• network.setCacheBehavior command (1906100)
• permissions.setPermission command (1875065)
• storage.deleteCookies command (1854581)
• storage.getCookies command (1854580)
• storage.setCookie command (1854582)
• userAgent capability (1885495)

Add-ons

• contextualIdentities.move function (1333395)
• runtime.getContexts function (1875480)
• runtime.onPerformanceWarning event (1861445)
• storage.session support storage.StorageArea.getBytesInUse() and storage.session.QUOTA_BYTES property (1908925)
• webRequest.onAuthRequired (1889897)

Protocols

• ULPFEC packet loss recovery

HTTP

• 103 Early Hints informational response status code enabled LINK rel=preload (1874445)
• fetchpriority directive in the HTTP Link header (1854077)
• Priority request and response header (1865040)
• zstd directive supported in Content-Encoding HTTP header

Origin Trials

• dom.origin-trials.private-attribution (1900929)

Related Projects

• Interop 2024
  • Our announcement blog post: https://hacks.mozilla.org/2024/02/announcing-interop-2024/
• ...

Specifications and Notes

Edit and publish new and updated specifications and notes. See Standards for our ongoing work in this area.

• Vision for W3C
  • 2024-04-03 Vision Group Note (first official W3C AB Note)
  • 2024-10-18 Vision Group Note and calls for wide & horizontal review
• ...

Previously

• Platform/2023PlannedWork

See Also

• Platform
• Platform/Planning