Firefox 32 for developers

Changes for Web developers

Developer Tools

Highlights:

Web Audio Editor
Code completion and inline documentation in Scratchpad
User agent styles in the Inspector's Rules view
Element picker button has moved
Node dimensions added to the Inspector's infobar
Full page screenshot button added
HiDPI images added to the tools
Nodes that have display:none are shown differently in the Inspector

All devtools bugs fixed between Firefox 31 and Firefox 32.

CSS

Enabled mix-blend-mode by default (bug 952643).
Enabled position:sticky by default in release builds (only enabled on Nightly and Aurora before) (bug 916315).
Implemented box-decoration-break and removed the non-standard -moz-background-inline-policy(bug 613659).
Allowed flex-grow and flex-shrink to transition between zero and nonzero values, like 'flex-grow: 0.6'(bug 996945).

HTML

Experimentally implemented, behind a pref, <img> srcset property, To activate it set dom.image.srcset.enable to true (bug 870021).
id and class are now true global attributes and also apply to XML elements, in a namespace or not (bug 741295).

JavaScript

The following new ECMAScript 6 built-in methods got implemented:

Interfaces/APIs/DOM

The navigator.languages property and languagechange event have been implemented (bug 889335).
The Navigator.vibrate() method behavior has been adapted to the latest specification: too long vibrations are now truncated (bug 1014581).
The KeyboardEvent.getModifierState() and MouseEvent.getModifierState() methods have been extended to support the Accel virtual modifier (bug 1009388).
The KeyboardEvent.code property have been experimentally implemented: it is disabled on release build (bug 865649).
Scoped selectors for Document.querySelector() and Document.querySelectorAll(), for example querySelector(":scope > li")have been implemented (bug 528456).
The experimental implementation of the Document.timeline interface, related to the Web Animation API, has been added (bug 998246). It is controlled by layout.web-animations.api.enabled preference, enabled only on Nightly and Aurora for the moment.
The Data Store API has been made available to Web Workers (bug 949325). It still is only activated for certified applications.
The ServiceWorker InstallPhaseEvent and InstallEvent interfaces have been implemented (bug 967264).
The MSISDN Verification API, only activated for privileged apps, has been added (bug 988469).
The Gamepad API is now supported on Firefox for Android (bug 852935).
To match the spec and the evolution of the CSS syntax, minor changes have been done to CSS.escape(). The identifier now can begins with '--' and the second dash must not be escaped. Also vendor identifier are no more escaped. (bug 1008719)
To complete our Hit Regions implementation, MouseEvent.region has been implemented (bug 979692).
The CanvasRenderingContext2D.drawFocusIfNeeded() method is now enabled by default (bug 1004579).
The Navigator.doNotTrack properties now returns '1' or '0', reflecting the HTTP value, instead of 'yes' or 'no' (bug 887703).
XMLHttpRequest.responseURL was implemented (bug 998076)..

MathML

Add support for the <menclose> notation phasorangle.

SVG

No change.

WebRTC

New constraints for WebRTC's getUserMedia(), width, height, and framerate, have been added, to limit stream dimensions and frame rate (bug 907352):

{
  mandatory: {
    width: { min: 640 },
    height: { min: 480 }
  },
  optional: [
    { width: 650 },
    { width: { min: 650 }},
    { frameRate: 60 },
    { width: { max: 800 }},
  ]
}

WebRTC methods which previously used callback functions as input parameters are now also available using JavaScript promises.

Audio/Video

No change.

Security

Privileged code now gets Xray vision for JavaScript Object and Array instances.

Changes for add-on and Mozilla developers

Xray vision is now applied to JavaScript objects that are not themselves DOM objects: Xrays for JavaScript objects.

A getDataDirectory() method has been added to Addon instances. This method returns the preferred location, within the current profile, for add-ons to store data.

Add-on SDK

Highlights

Added exclude option to PageMod.
Added anonymous option to Request.
Add-on Debugger now includes a Console and a Scratchpad.

Details

GitHub commits made between Firefox 31 and Firefox 32. This will not include any uplifts made after this release entered Aurora.

Bugs fixed between Firefox 31 and Firefox 32. This will not include any uplifts made after this release entered Aurora.

XPCOM

The nsIUDPSocket interface now provides multicast support through the addition of the new nsIUDPSocket.multicastLoopback, nsIUDPSocket.multicastInterface, and nsIUDPSocket.multicastInterfaceAddr attributes, as well as the nsIUDPSocket.joinMulticast() and nsIUDPSocket.leaveMulticast() methods.