Firefox 68 für Entwickler

This article provides information about the changes in Firefox 68 that will affect developers. Firefox 68 is the current Beta version of Firefox, and will ship on July 9, 2019.

Changes for web developers

Developer tools

• Die Einstellung, die die Sichtbarkeit interner Erweiterungen (System-Add-Ons und versteckte Erweiterungen) auf der about:debugging-Seite kontrolliert, wurde von devtools.aboutdebugging.showSystemAddons zu  devtools.aboutdebugging.showHiddenAddons geändert (Bug 1544372).
• Die Konsole zeigt jetzt mehr Informationen über CSS-Warnungen inklusive einer Liste der Knoten der DOM-Elemente, die die Regel genutzt haben (Bug 1093953).
• Über die Anfragen-Liste der Netzwerkanalyse kann jetzt eine spezifische URL geblockt werden (Bug 1151368).
• Es ist jetzt möglich, eine Netzwerkanfrage erneut zu senden, ohne das Verfahren, die URL, die Parameter oder die Überschrift ändern zu müssen, indem der Resend-Befehl im Kontextmenü ausgeführt wird (Bug 1422014).
• Es ist jetzt möglich, die Breite der Spalten in der Netzwerkanalyse zu ändern, um dem Arbeitsalauf gerecht zu werden. (Bug 1358414).
• The context menu of the Headers tab now allows you to copy all or some of the header information to the clipboard in JSON format (Bug 1442249).
• A button has been added to the rules panel of the Page Inspector that allows you to toggle display of any print media queries (Bug 1534984).
• An icon will be displayed next to invalid or unsupported CSS rules in the Rules pane of the Page Inspector (Bug 1306054).

Removals

HTML

No changes.

 Removals

CSS

• CSS Scroll Snapping has been updated to the latest version of the specification (Bug 1312163) and (Bug 1544136), this includes:
  • The scroll-padding properties (Bug 1373832)
  • The scroll-margin properties (Bug 1373833)
  • scroll-snap-align (Bug 1373835)
• The -webkit-line-clamp property has been implemented for compatibility with other browsers (Bug 866102).
• Support ::marker pseudo-element (Bug 205202) and animation for ::marker pseudos (Bug 1538618)
• Change currentcolor to be a computed value (except for color property)  (Bug 760345).
• Fix support for the 'ch' length unit to match spec (fallback for no '0' glyph, vertical metrics) (Bug 282126)
• The  counter-set property has been implemented. (Bug 1518201)
• Implement list numbering using a built-in 'list-item' counter - fixes list numbering bugs (Bug 288704)
• CSS Transforms are now supported in indirectly rendered things e.g.)  <mask>,  <marker>,  <pattern>,  <clipPath> (Bug 1323962).

Removals

• scroll-snap-coordinate, scroll-snap-destination, scroll-snap-type-x and scroll-snap-type-y have been removed.
• The scroll-snap-type property has become a longhand, so the old shorthand syntax like scroll-snap-type:mandatory will stop working. See the Firefox Site Compatability note.

SVG

No changes.

Removals

JavaScript

No changes.

Removals

APIs

No changes.

New APIs

• Implement Resize Observer API (Bug 1272409).

DOM

• The Visual Viewport API has now been enabled by default on Android (Bug 1512813). Adding this API to desktop versions of Firefox is being tracked in Bug 1551302.
• The decode() element on images is now implemented. this can be used to trigger loading and decoding of an image prior to adding it to the DOM (Bug 1501794).
• The Notifications API now requires that the user interact with the page before it can request permission to send notifications (Bug 1524619).
• XMLHttpRequest has been updated to no longer accept the non-standard moz-chunked-arraybuffer value for responseType. Code still using it should be updated to use the Fetch API as a stream (Bug 1120171).
• XMLHttpRequest now outputs a warning to console if you perform a synchronous request while handling an unload, beforeunload, or pagehide event (Bug 980902).
• The cookie property has moved from the HTMLDocument interface to the Document interface, allowing documents other than HTML to use cookies (Bug 144795).

DOM events

Service workers

Media, Web Audio, and WebRTC

• WebRTC has been updated to recognize that a null candidate passed into the icecandidate event handler, indicating the receipt of a candidate, instead indicates that there are no further candidates coming; when this happens the ICE gathering (iceGatheringState) state reaches complete (Bug 1318167).
• The RTCRtpReceiver methods getContributingSources() and getSynchronizationSources() now support video tracks; previously they only worked on audio (Bug 1534466).

• getUserMedia() may no longer be used from a non-secure context; attempting to do so now throws a NotAllowedError result. Secure contexts are those loaded using HTTPS, those located using the file:/// scheme, and those loaded from localhost. For now, if you must, you can re-enable the ability to perform insecure calls to getUserMedia() by setting the preference media.getusermedia.insecure.enabled to true (Bug 1335740).

  Note: In the future, Firefox will also remove the navigator.mediaDevices property on insecure contexts, preventing all access to the MediaDevices APIs; see Bug  for the status of this work. This is already the case in Nightly builds.

Canvas and WebGL

Removals

• Removed the non-standard XMLDocument.load() method (Bug 332175).
• Removed the non-standard XMLDocument.async property (Bug 1328138).

Security

No changes.

Removals

Plugins

No changes.

Removals

Other

No changes.

Removals

Changes for add-on developers

API changes

• The The proxy.register() and proxy.unregister() functions have been deprecated and will be removed from Firefox 71 (Bug 1545811).

Removals

Manifest changes

No changes.

Removals

See also

• Site compatibility for Firefox 68

Older versions