"BarcodeDetector: BarcodeDetector() constructor"

https://developer.mozilla.org/ja/docs/Web/API/BarcodeDetector/BarcodeDetector

"PaymentRequestEvent: paymentRequestId property"

https://developer.mozilla.org/en-US/docs/Web/API/PaymentRequestEvent/paymentRequestId

Updating add-ons for Firefox 5

https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/5/Updating_add-ons

"Element: childElementCount property"

https://developer.mozilla.org/ja/docs/Web/API/Element/childElementCount

"ARIA: menu role"

https://developer.mozilla.org/ja/docs/Web/Accessibility/ARIA/Reference/Roles/menu_role

"RTCDataChannel: label property"

https://developer.mozilla.org/en-US/docs/Web/API/RTCDataChannel/label

"ResizeObserverEntry: target property"

https://developer.mozilla.org/ja/docs/Web/API/ResizeObserverEntry/target

"HTMLElement: offsetHeight property"

https://developer.mozilla.org/ja/docs/Web/API/HTMLElement/offsetHeight

Taking still photos with getUserMedia()

https://developer.mozilla.org/ja/docs/Web/API/Media_Capture_and_Streams_API/Taking_still_photos

"HTMLTableElement: deleteTHead() method"

https://developer.mozilla.org/ja/docs/Web/API/HTMLTableElement/deleteTHead

"SVGFECompositeElement: y property"

https://developer.mozilla.org/en-US/docs/Web/API/SVGFECompositeElement/y

devtools.panels.create()

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools/panels/create

"Report: url property"

https://developer.mozilla.org/en-US/docs/Web/API/Report/url

PromiseRejectionEvent

https://developer.mozilla.org/ja/docs/Web/API/PromiseRejectionEvent

Chrome incompatibilities

https://developer.mozilla.org/ja/docs/Mozilla/Add-ons/WebExtensions/Chrome_incompatibilities

cookies

https://developer.mozilla.org/ja/docs/Mozilla/Add-ons/WebExtensions/API/cookies

"MediaKeySession: keyStatuses property"

https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySession/keyStatuses

"WebGLRenderingContext: getExtension() method"

https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/getExtension

SVG

https://developer.mozilla.org/ja/docs/Glossary/SVG

"FileReader: error event"

https://developer.mozilla.org/ja/docs/Web/API/FileReader/error_event

"resource: URLs"

https://developer.mozilla.org/ja/docs/Web/URI/Reference/Schemes/resource

"Range: startContainer property"

https://developer.mozilla.org/ja/docs/Web/API/Range/startContainer

-webkit-text-fill-color

https://developer.mozilla.org/ja/docs/Web/CSS/Reference/Properties/-webkit-text-fill-color

"Notification: tag property"

https://developer.mozilla.org/ja/docs/Web/API/Notification/tag

"MediaMetadata: chapterInfo property"

https://developer.mozilla.org/en-US/docs/Web/API/MediaMetadata/chapterInfo

"NavigateEvent: scroll() method"

https://developer.mozilla.org/en-US/docs/Web/API/NavigateEvent/scroll

number

https://developer.mozilla.org/ja/docs/Web/XML/XPath/Reference/Functions/number

Long task

https://developer.mozilla.org/ja/docs/Glossary/Long_task

"MediaMetadata: album property"

https://developer.mozilla.org/ja/docs/Web/API/MediaMetadata/album

"CharacterData: appendData() method"

https://developer.mozilla.org/ja/docs/Web/API/CharacterData/appendData

"SVGRadialGradientElement: cx property"

https://developer.mozilla.org/en-US/docs/Web/API/SVGRadialGradientElement/cx

CSS grid layout

https://developer.mozilla.org/ja/docs/Web/CSS/CSS_grid_layout

CompositionEvent

https://developer.mozilla.org/ja/docs/Web/API/CompositionEvent

https://developer.mozilla.org/ja/docs/Web/SVG/Reference/Element/set

"USBDevice: usbVersionSubminor property"

https://developer.mozilla.org/ja/docs/Web/API/USBDevice/usbVersionSubminor

USBDevice

https://developer.mozilla.org/ja/docs/Web/API/USBDevice

"TypeError: null/undefined has no properties"

https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Errors/No_properties

https://developer.mozilla.org/ja/docs/Web/XML/XSLT/Reference/Element/output

"SVGRadialGradientElement: fy property"

https://developer.mozilla.org/en-US/docs/Web/API/SVGRadialGradientElement/fy

"js13kGames: Progressive loading"

https://developer.mozilla.org/ja/docs/Web/Progressive_web_apps/Tutorials/js13kGames/Loading