Firefox 42 for developers

Modifiche per gli sviluppatori

Strumenti per gli sviluppatori

In evidenza:

• Debugging Firefox per Android tramite Wifi
• Firefox OS Simulator configuration in WebIDE
• CSS filter presets

All devtools bugs fixed between Firefox 41 and Firefox 42.

CSS

• Vertical writing-mode is now supported with rtl scripts (bug 1131451).
• Non-standard proprieties like -moz-margin-start are now aliases of their standard counterpart (margin-inline-start, …). Previously, it was the opposite. This affects the value returned by CSSStyleDeclaration.cssText and iteration of the properties in a style ruleand iteration of the properties in a style rule, that both use the canonical form (bug 1118103).

HTML

• The referrer attribute of the <input> (bug 1166910), <a> and <area> (bug 1174913) has been implemented.

JavaScript

• The Reflect object has been implemented (bug 987514).
• The implementation of the Proxy handler.ownKeys() trap has been updated to match the final ES2015 specification (bug 1049662).
• Calling Map, Set, or WeakMap without new, will now throw a TypeError (bug 1083752).

Interfaces/APIs/DOM

DOM & HTML DOM

• Event.offsetX and Event.offsetY have been added (bug 69787).
• The HTMLInputElement interface has been experimentally extended to handle the upload of directories (bug 1164310). These four members are now available behind the dom.input.dirpicker preference:
  • HTMLInputElement.directory
  • HTMLInputElement.isFilesAndDirectoriesSupported
  • HTMLInputElement.getFilesAndDirectories()
  • HTMLInputElement.chooseDirectory()
• The Directory interface has been experimentally extended (bug 1177688). The two members Directory.path and Directory.getContents are now available.
• The HTMLMediaElement.mozSrcObject has been renamed in HTMLMediaElement.srcObject (bug 1175523).

Service Workers

• Request.context has been removed (bug 1188062).
• The Push API has been activated by default on Firefox for Desktop (bug 1153499), but only on the Nightly/Dev Edition/Beta channels. It is being deactivated by default in the Release channel until consumer UX and debugging features have been properly implemented (bug 1207875.) You can still activate it by enabling the dom.push.enabled pref in about:config.
• The PushManager.hasPermission() method has been deprecated in the spec, and replaced with the PushManager.permissionState() method. Firefox has updated its implementation to reflect this (bug 1183853.)
• Service-worker-related additions to the Notifications API have been implemented (bug 1114554), but are disabled in this release.

Web Animations API

Our experimental implementation of Web Animations API have been extended to support:

• The AnimationPlayer.playbackRate property (bug 1127380).
• The CSSAnimation and CSSTransition interfaces (bug 1178186).
• The Animation.reverse() method (bug 1150808).
• The AnimationPlaybackEvent interface has been added and cancel and finish are now fired on Animation (bug 1178664).

Web Components

Our experimental implementation of the Shadow DOM has been modified:

• When trying to invoke Node.cloneNode() on a ShadowRoot, throws a DataCloneError exception (bug 1176757).
• When invoking Document.importNode() with a ShadowRoot as an argument, we now throws a NotSupportedError exception (bug 1177914).
• When invoking Document.adoptNode() with a ShadowRoot as an argument, we now throws a HierarchyRequestError exception (bug 1177991).

WebGL

• WebGL2 WebGLTransformFeedback has been implemented (bug 1048724).
• The WEBGL_debug_renderer_info extension has been turned on by default (bug 1171228).
• To obtain a WebGL2 context, HTMLCanvasElement.getContext() now takes webgl2 instead of experimental-webgl2 previously (bug 1187174).

WebRTC

• The RTCICECandidatePairStats.mozPriority has been renamed to RTCICECandidatePairStats.priority (bug 1184426).

New APIs

• The ImageBitmap interface and the createImageBitmap() method have been implemented. They are available on regular window scripts and in Web workers and allow efficient posting of images between window and worker contexts (bug 1044102).

Miscellaneous

• The IDBCursorWithValue interface is now available in Web workers (bug 1188115).
• Error events sent in Web workers doesn't bubble anymore (bug 1188141).
• Media Source Extensions (MSE) has been activated for all Web sites, and no more for a white list of sites (bug 1185611).
• The non-standard and deprecated Window.mozRequestAnimationFrame() has been removed (bug 909154). Use the standard Window.requestAnimationFrame() instead.

MathML

No change.

SVG

No change.

Audio/Video

No change.

HTTP

No change.

Networking

• The CSP upgrade-insecure-requests directive has been implemented (bug 1139297).

Sicurezza

• EV certificates with a validity greater than 39 months are now considered and handled as DV certificates (bug 1145679).

Cambiamenti per gli add-on e Mozilla developers

Interfaces

nsIContentPolicy

• The TYPE_EMBED constant has been added to nsIContentPolicy to allow Gecko internals and add-on code to better differentiate different types of requests. Previously, TYPE_OBJECT was used for these cases (bug 1148030).
• Similarly, the TYPE_SUBDOCUMENT constants has been split into TYPE_FRAME and TYPE_IFRAME (bug 1148044).

XUL

No change.

JavaScript code modules

No change.

XPCOM

No change.

Other

No change.

See also

• Site Compatibility for Firefox 42

Older versions