2020-10-21

WebKit (WebCore)

• Added: Lazy image loading

  Status	In Development

2020-08-11

WebKit (WebCore)

• Added: Cross-Origin Resource Policy

  Status	Supported

• Added: HTTP Cache Partitioning

  Status	Supported

• Added: Client-Side Storage Partitioning

  Status	Supported

2020-08-04

Edge

• Added: Client-side video editing (MediaBlob)

  Status	Not Supported

2020-07-23

WebKit (WebCore)

• Changed: Async Clipboard API

  Status	In Development	→	Supported

• Added: CSS Selector :focus-visible

  Status	Under Consideration
  EnabledByDefault	false

• Added: CSS Containment Level 1

  Status	Under Consideration
  EnabledByDefault	false

2020-07-22

WebKit (WebCore)

• Changed: Web App Manifest

  Status	In Development	→	Partially Supported

• Added: inert attribute

  Status	Under Consideration
  EnabledByDefault	false

2020-06-23

Firefox

• Changed: CSS Motion Path

  Status	in-development	→	shipped
  Channel	(n/a)	→	release
  Version	(n/a)	→	72

• Changed: CSS Subgrids

  Status	in-development	→	shipped
  Channel	(n/a)	→	release
  Version	(n/a)	→	71

• Changed: Link Rel Preload

  Status	shipped	→	in-development
  Channel	release	→	(n/a)
  Version	56	→	(n/a)

• Added: CSS individual transform properties

  Status	shipped
  Channel	release
  Version	72

• Added: CSS min(), max(), and clamp()

  Status	shipped
  Channel	release
  Version	75

• Added: Event-based form participation

  Status	shipped
  Channel	release
  Version	72

• Added: Feature policy

  Status	shipped
  Channel	release
  Version	73

• Added: HTML <img> lazy loading

  Status	shipped
  Channel	release
  Version	75

• Added: MathML

  Status	shipped
  Channel	release
  Version	1

• Added: Media Session API

  Status	shipped
  Channel	release
  Version	71

• Added: Shadow Parts

  Status	shipped
  Channel	release
  Version	72

• Added: Text Decoration 4

  Status	shipped
  Channel	release
  Version	70

2020-06-15

WebKit (JavaScriptCore)

• Added: BigInt

  Status	Supported
  EnabledByDefault	true

2020-05-20

Edge

• Changed: Credential Management API

  Status	Partial Support (WebAuthn only)	→	Partial Support

• Changed: Directory Upload

  Status	Partial Support (webkitdirectory attribute https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/webkitdirectory)	→	Partial Support

• Changed: TLS 1.3

  Status	Provided-by-underlying-OS (Non-public target Win10 20H2)	→	Provided-by-underlying-OS

• Changed: Meta Referrer

  Status	Partial Support (Only `never`, `always`, `origin`, `default` tokens are supported for navigation)	→	Partial Support

• Changed: Orientation Sensor

  Status	Not Supported (DeviceOrientation is supported https://developer.mozilla.org/en-US/docs/Web/API/Detecting_device_orientation#DeviceOrientationEvent)	→	Not Supported

2020-05-19

Edge

• Changed: ES Module Attributes

  Status	Under Consideration	→	Not Supported

• Changed: URL Protocol Handler Registration for PWAs

  Status	In Development	→	Not Supported

• Changed: Run PWA on OS Login

  Status	In Development	→	Not Supported

• Changed: Version History

  Status	In Development	→	Not Supported

• Changed: Window Controls Overlay for Installed Desktop Web Apps

  Status	In Development	→	Not Supported

• Changed: EditContext API

  Status	In Development	→	Not Supported

• Changed: App shortcuts

  Status	In Development	→	Not Supported

• Changed: MediaCapabilities: query HDR with decodingInfo()

  Status	In Development	→	Not Supported

• Changed: MediaCapabilities: query spatial audio with decodingInfo()

  Status	In Development	→	Not Supported

• Changed: Forced colors mode

  Status	Shipped	→	Not Supported

• Changed: New System Color Keywords

  Status	Shipped	→	Not Supported

• Changed: Storage Access API

  Status	In Development	→	Not Supported

• Changed: VirtualKeyboard API

  Status	In Development	→	Not Supported

• Changed: Delegated ink trail

  Status	In Development	→	Not Supported

• Changed: Window Segments Enumeration API

  Status	In Development	→	Not Supported

• Changed: DualScreen/Foldables CSS additions

  Status	In Development	→	Not Supported

• Changed: Cookies default to SameSite=Lax

  Status	In Development	→	Not Supported

• Changed: AV1 Decoder

  Status	In Development	→	Not Supported

• Changed: WebGPU

  Status	In Development	→	Not Supported

• Changed: WebXR Device API

  Status	In Development	→	Not Supported

• Changed: WebXR Gamepads Module - Level 1

  Status	In Development	→	Not Supported

2020-05-18

Edge

• Added: Secure Contexts

  Status	Shipped

• Added: Web Speech API (Speech Recognition)

  Status	In Development (Windows & Mac backend services)

• Added: URL Protocol Handler Registration for PWAs

  Status	In Development

• Added: Run PWA on OS Login

  Status	In Development

• Added: Version History

  Status	In Development

• Added: Window Controls Overlay for Installed Desktop Web Apps

  Status	In Development

• Added: EditContext API

  Status	In Development

• Added: App shortcuts

  Status	In Development

• Added: MediaCapabilities: query HDR with decodingInfo()

  Status	In Development

• Added: MediaCapabilities: query spatial audio with decodingInfo()

  Status	In Development

• Added: Forced colors mode

  Status	Shipped

• Added: New System Color Keywords

  Status	Shipped

• Added: Storage Access API

  Status	In Development

• Added: VirtualKeyboard API

  Status	In Development

• Added: Delegated ink trail

  Status	In Development

• Added: Window Segments Enumeration API

  Status	In Development

• Added: DualScreen/Foldables CSS additions

  Status	In Development

• Added: Cookies default to SameSite=Lax

  Status	In Development

• Added: AV1 Decoder

  Status	In Development

• Added: WebGPU

  Status	In Development

• Added: WebXR Device API

  Status	In Development

• Added: WebXR Gamepads Module - Level 1

  Status	In Development

• Removed: Secure Contexts
• Removed: Web Speech API (Speech Recognition)

2020-05-15

Edge

• Changed: font-variant longhands

  Status	Under Consideration	→	Not Supported

• Changed: From-Origin header

  Status	Under Consideration	→	Not Supported

• Changed: requestIdleCallback

  Status	Under Consideration	→	Not Supported

• Changed: CSS resize

  Status	Under Consideration	→	Not Supported

• Changed: Frame Timing

  Status	Under Consideration	→	Not Supported

• Changed: Performance Observer

  Status	Under Consideration	→	Not Supported

• Changed: CSS Containment

  Status	Under Consideration	→	Not Supported

• Changed: Initial Letter

  Status	Under Consideration	→	Not Supported

• Changed: Resize Observer

  Status	Under Consideration	→	Not Supported

• Changed: Server Timing

  Status	Under Consideration	→	Not Supported

• Changed: Preload

  Status	In Development	→	Not Supported

• Changed: Preconnect Resource Hints

  Status	Under Consideration	→	Not Supported

• Changed: Credential Management API

  Status	In Development	→	Partial Support (WebAuthn only)

• Changed: <details>/<summary>

  Status	Under Consideration	→	Not Supported

• Changed: Directory Upload

  Status	Under Consideration	→	Partial Support (webkitdirectory attribute https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/webkitdirectory)

• Changed: CSP Level 3 strict-dynamic source expression

  Status	Under Consideration	→	Not Supported

• Changed: CSS Will Change

  Status	Under Consideration	→	Not Supported

• Changed: CSSOM View smooth scroll API

  Status	Under Consideration	→	Not Supported

• Changed: Custom Elements

  Status	In Development	→	Not Supported

• Changed: Drag and Drop Directories

  Status	In Development	→	Not Supported

• Changed: Generated Content for Paged Media

  Status	Under Consideration	→	Not Supported

• Changed: HTML Form HTTP Extensions

  Status	Under Consideration	→	Not Supported

• Changed: HTML Imports

  Status	Not currently planned	→	Not Supported

• Changed: HTTP Client Hints

  Status	Under Consideration	→	Not Supported

• Changed: iframe[seamless] attribute

  Status	Under Consideration	→	Not Supported

• Changed: iframe[srcdoc] attribute

  Status	In Development	→	Not Supported

• Changed: IndexedDB Arrays and MultiEntry Support

  Status	Under Consideration	→	Not Supported

• Changed: MediaRecorder

  Status	Under Consideration	→	Not Supported

• Changed: mix-blend-mode

  Status	Under Consideration	→	Not Supported

• Changed: background-blend-mode

  Status	Preview Release	→	Not Supported

• Changed: SVG2

  Status	Under Consideration	→	Partial Support

• Changed: Support dataset property on SVGElement

  Status	In Development	→	Not Supported

• Changed: TLS 1.3

  Status	In Development	→	Provided-by-underlying-OS (Non-public target Win10 20H2)

• Changed: UIEvents - Keyboard Query APIs

  Status	Under Consideration	→	Not Supported

• Changed: Vibration API

  Status	Under Consideration	→	Not Supported

• Changed: Web Animations JavaScript API

  Status	Under Consideration	→	Not Supported

• Changed: Web Speech API (Speech Recognition)

  Status	Under Consideration	→	Not Supported

• Changed: WebGL 2.0

  Status	Under Consideration	→	Not Supported

• Changed: CSS filter() image function

  Status	Under Consideration	→	Not Supported

• Changed: CSS filter(url) using SVG elements

  Status	Under Consideration	→	Not Supported

• Changed: Ambient Light Sensor API

  Status	Preview Release	→	Not Supported

• Changed: Battery Status API

  Status	Under Consideration	→	Not Supported

• Changed: Canvas2D text decoration

  Status	Under Consideration	→	Not Supported

• Changed: Network Error Logging

  Status	Under Consideration	→	Not Supported

• Changed: Shapes

  Status	Under Consideration	→	Not Supported

• Changed: inputmode

  Status	Under Consideration	→	Not Supported

• Changed: Shadow DOM

  Status	In Development	→	Not Supported

• Changed: object-fit and object-position (video/canvas/etc)

  Status	Under Consideration	→	Not Supported

• Changed: FileWriter

  Status	Under Consideration	→	Not Supported

• Changed: Promise.prototype.finally

  Status	In Development	→	Supported

• Changed: Shared Memory and Atomics

  Status	Preview Release	→	Not Supported

• Changed: Karaoke Web Standard

  Status	Under Consideration	→	Not Supported

• Changed: Meta Referrer

  Status	In Development	→	Partial Support (Only `never`, `always`, `origin`, `default` tokens are supported for navigation)

• Changed: RegExp Built-ins (ES6)

  Status	Preview Release	→	Not Supported

• Changed: Object rest/spread properties

  Status	Under Consideration	→	Not Supported

• Changed: Asynchronous Iterators

  Status	Under Consideration	→	Not Supported

• Changed: Tail Calls (ES6)

  Status	Under Consideration	→	Not Supported

• Changed: SIMD

  Status	Preview Release	→	Not Supported

• Changed: <dialog> element for modals

  Status	Under Consideration	→	Not Supported

• Changed: Media Fragments

  Status	Under Consideration	→	Partial Support

• Changed: Web Bluetooth

  Status	Under Consideration	→	Not Supported

• Changed: Web NFC API

  Status	Under Consideration	→	Not Supported

• Changed: CSS Logical Properties Level 1

  Status	Under Consideration	→	Not Supported

• Changed: International input[type=email] validation

  Status	Under Consideration	→	Not Supported

• Changed: OGG Container

  Status	In Development	→	Supported

• Changed: RTC Data Channels

  Status	Under Consideration	→	Not Supported

• Changed: image-rendering

  Status	Under Consideration	→	Not Supported

• Changed: CSS Motion Path

  Status	Under Consideration	→	Not Supported

• Changed: CSS image-set()

  Status	Under Consideration	→	Not Supported

• Changed: CSS all shorthand

  Status	Under Consideration	→	Not Supported

• Changed: CSS Contextual Reference Element Pseudo-class :scope

  Status	Under Consideration	→	Not Supported

• Changed: CSS tab-size property

  Status	Under Consideration	→	Not Supported

• Changed: CSS Relational Pseudo-class :has

  Status	Under Consideration	→	Not Supported

• Changed: CSS Level 3 attr() function

  Status	Under Consideration	→	Not Supported

• Changed: <menu> Element

  Status	Under Consideration	→	Not Supported

• Changed: ol[reversed] attribute

  Status	Under Consideration	→	Not Supported

• Changed: Media Capture from Canvas

  Status	Under Consideration	→	Not Supported

• Changed: Media Capture from HTML Media Element

  Status	Under Consideration	→	Not Supported

• Changed: Audio Output Devices API

  Status	Under Consideration	→	Supported

• Changed: FindText API

  Status	Under Consideration	→	Not Supported

• Changed: CSS Font Loading API

  Status	Under Consideration	→	Not Supported

• Changed: Touch-action: pan-up pan-down pan-left pan-right CSS properties

  Status	Under Consideration	→	Not Supported

• Changed: Encoding Standard

  Status	In Development	→	Not Supported

• Changed: Background Sync API

  Status	In Development	→	Not Supported

• Changed: Media Session

  Status	Under Consideration	→	Not Supported

• Changed: CSS Selectors Level 4

  Status	Under Consideration	→	Not Supported

• Changed: Picture-in-Picture

  Status	Under Consideration	→	Not Supported

• Changed: :focus-visible pseudo-class

  Status	Under Consideration	→	Not Supported

• Changed: Media Queries: prefers-reduced-motion

  Status	Under Consideration	→	Not Supported

• Changed: Web Share API

  Status	Under Consideration	→	Not Supported

• Changed: inert attribute

  Status	Under Consideration	→	Not Supported

• Changed: :focus-within pseudo-class

  Status	Under Consideration	→	Not Supported

• Changed: Accelerometer

  Status	Under Consideration	→	Not Supported

• Changed: Gyroscope

  Status	Under Consideration	→	Not Supported

• Changed: Magnetometer

  Status	Under Consideration	→	Not Supported

• Changed: Orientation Sensor

  Status	Under Consideration	→	Not Supported (DeviceOrientation is supported https://developer.mozilla.org/en-US/docs/Web/API/Detecting_device_orientation#DeviceOrientationEvent)

• Changed: Payment Handler API

  Status	Under Consideration	→	Not Supported

• Changed: Origin-Signed HTTP Exchanges

  Status	Under Consideration	→	Not Supported

2020-05-08

Edge

• Added: ES Module Attributes

  Status	Under Consideration