2019-09-18

Chromium

• Changed: WebAssembly BigInt Integration

  Status	Proposed	→	Behind a flag
  Flag	False	→	True
  Desktop	(n/a)	→	79

• Changed: Subresource prefetching+loading via Signed HTTP Exchange

  Status	Proposed	→	Origin trial
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Changed: WebAssembly Reference Types

  Status	In development	→	Behind a flag
  Flag	False	→	True
  Desktop	(n/a)	→	78

• Added: Microtransaction payment handlers

  Status	In development

2019-09-17

Chromium

• Changed: Autofocus support for any focusable HTML/SVG element

  Status	No active development	→	Enabled by default
  Android	(n/a)	→	79
  Desktop	(n/a)	→	79

• Changed: Native File System

  Status	In development	→	Origin trial
  Desktop	(n/a)	→	78

• Changed: Add purpose member to the Web App Manifest

  Status	Enabled by default	→	No longer pursuing
  Android	68	→	(n/a)
  Desktop	68	→	(n/a)

2019-09-16

Chromium

• Changed: ontransition{run, start, cancel} event handler attributes

  Status	In development	→	Enabled by default
  Android	(n/a)	→	79
  Desktop	(n/a)	→	79

WebKit (WebCore)

• Changed: Battery Status API

  Status	Removed	→	Not Considering

• Changed: WebGL 2

  Status	Supported In Preview	→	In Development

• Added: Dialog Element

  Status	Under Consideration

2019-09-15

Chromium

• Changed: font-optical-sizing

  Status	In development	→	Enabled by default
  Android	(n/a)	→	79
  Desktop	(n/a)	→	79

2019-09-13

Chromium

• Changed: Rendersubtree attribute

  Android	76	→	79
  Desktop	76	→	79

• Changed: WebXR Anchors

  Status	Proposed	→	Behind a flag
  Flag	False	→	True
  Android	(n/a)	→	79

• Changed: WebXR plane detection API

  Status	Proposed	→	Behind a flag
  Flag	False	→	True
  Android	(n/a)	→	77

2019-09-12

Chromium

• Changed: -webkit-appearance keywords for arbitrary elements

  Android	78	→	79
  Desktop	78	→	79

• Added: ontransition{run, start, cancel} event handler attributes

  Status	In development

2019-09-11

Chromium

• Changed: -webkit-appearance keywords for arbitrary elements

  Status	No active development	→	Removed
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Added: WebXR DOM Overlay for Handheld AR

  Status	Proposed

2019-09-10

Chromium

• Changed: Text URL Fragments

  Status	Behind a flag	→	Origin trial
  Flag	True	→	False

• Added: Navigation to Bundled Exchanges

  Status	In development

2019-09-09

Chromium

• Added: Navigation-controls media query

  Status	Proposed

• Added: Add frozen or active lifecycleState to ServiceWorker Client

  Status	Behind a flag

2019-09-08

Chromium

• Changed: More restrictive show() for autofill instruments

  Status	In development	→	Behind a flag
  Flag	False	→	True
  Android	(n/a)	→	79
  Desktop	(n/a)	→	79

2019-09-06

Chromium

• Changed: WebVR v1.1

  Android	77	→	80
  Desktop	77	→	80

• Changed: CSS Properties and Values API Level 1 (Houdini)

  Status	In development	→	Enabled by default
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Changed: More restrictive hasEnrolledInstrument() for autofill instruments

  Status	In development	→	Behind a flag
  Flag	False	→	True
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

2019-09-05

Chromium

• Changed: WebAssembly Type Reflection JS API

  Status	Proposed	→	In development

• Changed: WebSocketStream

  Status	Behind a flag	→	Origin trial
  Flag	True	→	False

• Added: Compute img/video aspect ratio from width and height HTML attributes

  Status	In development

2019-09-04

Chromium

• Changed: Web Bluetooth getAvailability()

  Android	78	→	79
  Desktop	78	→	79

• Changed: Screen Enumeration

  Ios	78	→	(n/a)

• Changed: User Timing L3

  Status	In development	→	Enabled by default
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Added: Remove prefixed 'animationIteration' event handler

  Status	Proposed

2019-09-03

Chromium

• Changed: CSS Blending of background images (mix-blend-mode)

  Android	(n/a)	→	35

• Added: navigator.scheduling.isFramePending

  Status	In development

• Added: Screen Enumeration

  Status	Behind a flag

Firefox

• Added: Asynchronous Clipboard API

  Status	shipped
  Channel	release
  Version	63

• Added: AV1 video codec

  Status	shipped
  Channel	release
  Version	66

• Added: Block autoplaying audio

  Status	shipped
  Channel	release
  Version	66

• Added: CSS Containment

  Status	shipped
  Channel	beta
  Version	70

• Added: CSS environment variables (env())

  Status	shipped
  Channel	release
  Version	65

• Added: CSS prefers-reduced-motion Media Feature

  Status	shipped
  Channel	release
  Version	63

• Added: CSS scroll anchoring

  Status	shipped
  Channel	release
  Version	66

• Added: CSS Scroll Snap

  Status	shipped
  Channel	release
  Version	68

• Added: CSS steps() timing functions

  Status	shipped
  Channel	release
  Version	65

• Added: JavaScript BigInt

  Status	shipped
  Channel	release
  Version	68

• Added: JavaScript public class fields

  Status	shipped
  Channel	release
  Version	69

• Added: Microtask

  Status	shipped
  Channel	release
  Version	69

• Added: Readable Streams

  Status	shipped
  Channel	release
  Version	65

• Added: RelativeTimeFormat

  Status	shipped
  Channel	release
  Version	65

• Added: Resize Observer API

  Status	shipped
  Channel	release
  Version	69

• Added: Visual Viewport API

  Status	shipped
  Channel	release
  Version	68

• Added: WebP images

  Status	shipped
  Channel	release
  Version	65

• Added: WebXR Device API

  Status	in-development

• Added: Writable Streams

  Status	in-development

• Removed: CSS Interaction Media Features
• Removed: Streams API
• Removed: XSLT 3.0

2019-09-02

Chromium

• Added: Autofocus support for any focusable HTML/SVG element

  Status	No active development

• Added: Service Worker: Do not resurrect uninstalled workers.

  Status	No active development

2019-08-31

Chromium

• Added: IndexedDB relaxed durability transactions

  Status	In development

2019-08-30

Chromium

• Changed: Apply opacity for the default style of INPUT/TEXTAREA placeholder

  Status	In development	→	Enabled by default
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Changed: SMS Receiver API

  Status	In development	→	Behind a flag
  Flag	False	→	True
  Android	(n/a)	→	78

• Added: WebXR Gamepads Module - Level 1

  Status	Origin trial

2019-08-29

Chromium

• Changed: Disallow sync XHR in page dismissal

  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Changed: WebSocketStream

  Status	Proposed	→	Behind a flag
  Flag	False	→	True
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Changed: Layout Instability Monitoring

  Status	Origin trial	→	Enabled by default
  Android	73	→	77
  Desktop	73	→	77

• Added: CompressStream

  Status	Proposed

• Added: EditContext API

  Status	Proposed

• Added: Apply opacity for the default style of INPUT/TEXTAREA placeholder

  Status	In development

2019-08-28

Chromium

• Changed: TLS 1.3 downgrade hardening bypass

  Android	78	→	80
  Desktop	78	→	80

• Changed: JavaScript optional chaining

  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

2019-08-27

Chromium

• Added: XSS Auditor

  Status	Removed

2019-08-26

Chromium

• Changed: <dialog>: add DialogShowParams to show()/showModal()

  Status	In development	→	No active development

• Changed: PaymentResponse.prototype.retry()

  Status	Behind a flag	→	Enabled by default
  Flag	True	→	False
  Android	76	→	78
  Desktop	76	→	78

• Changed: Seeking for Media Session

  Status	In development	→	Enabled by default
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Changed: RTCQuicTransport & RTCQuicStream

  Status	No active development	→	Behind a flag
  Flag	False	→	True
  Android	(n/a)	→	73
  Desktop	(n/a)	→	73

• Changed: Picture-in-Picture (PiP)

  Android	(n/a)	→	78

• Changed: Disallow sync XHR in page dismissal

  Status	Enabled by default	→	Behind a flag
  Flag	False	→	True
  Android	78	→	(n/a)
  Desktop	78	→	(n/a)

• Changed: Scroll to CSS selector

  Status	In development	→	No longer pursuing

2019-08-23

Chromium

• Changed: Intrinsic size attribute

  Status	Behind a flag	→	No longer pursuing
  Flag	True	→	False
  Android	71	→	(n/a)
  Desktop	71	→	(n/a)

• Added: CSS content-size

  Status	Proposed

• Added: Display alerts for SameSite cookie changes in the developer console

  Status	Behind a flag

2019-08-22

Chromium

• Added: TLS 1.3 downgrade hardening bypass

  Status	Removed

2019-08-21

Chromium

• Changed: Don't allow popups during page unload

  Status	Removed	→	Enabled by default

• Changed: Web Bluetooth getAvailability()

  Status	In development	→	Enabled by default
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

• Changed: WebHID (Human Interface Device)

  Status	In development	→	Behind a flag
  Flag	False	→	True
  Desktop	(n/a)	→	78

• Changed: Alternative Text in CSS Generated Content

  Status	Behind a flag	→	Enabled by default
  Flag	True	→	False
  Desktop	75	→	77

• Changed: Precise src: local() matching in CSS @font-faces by PostScript and Full Font Name

  Status	Behind a flag	→	Enabled by default
  Flag	True	→	False

• Added: Element Reflection

  Status	In development

• Added: Font Enumeration

  Status	In development

• Added: Font Table Access

  Status	In development

• Added: Inline WebVTT Styling

  Status	In development

• Added: PointerLock unadjustedMovement

  Status	In development

2019-08-20

Chromium

• Changed: Extend byte-for-byte update check to all service worker importScripts() resources

  Status	In development	→	Enabled by default
  Android	(n/a)	→	78
  Desktop	(n/a)	→	78

2019-08-19

Chromium

• Changed: Feature Policy: Sandbox Features

  Status	Proposed	→	No longer pursuing

• Added: More restrictive show() for autofill instruments

  Status	In development

• Added: Rendering Independent Scroll Offsets

  Status	Behind a flag

2019-07-18

WebKit (WebCore)

• Added: Input modalities (inputmode attribute)

  Status	Supported
  EnabledByDefault	false

2019-06-27

WebKit (WebCore)

• Added: Web Bluetooth Scanning

  Status	Not Considering

2019-05-29

WebKit (WebCore)

• Changed: Web Authentication

  Status	In Development	→	Supported In Preview

2019-05-23

WebKit (WebCore)

• Changed: Conic Gradients

  Status	Supported in Preview	→	Supported

• Changed: Datalist Element

  Status	Supported in Preview	→	Supported

• Changed: Web Share

  Status	Supported in Preview	→	Supported

• Changed: Beacon API

  Status	Supported In Preview	→	Supported

• Changed: CSS Text Decoration Level 4

  Status	Supported in Preview	→	Supported

• Changed: Intersection Observer

  Status	Supported in Preview	→	Supported

2019-04-12

WebKit (WebCore)

• Added: CSS Shadow Parts

  Status	Under Consideration

2019-04-02

WebKit (WebCore)

• Added: Resize Observer

  Status	In Development
  EnabledByDefault	false