--- title: Firefox 32 for developers slug: Mozilla/Firefox/Releases/32 tags: - NeedsTranslation - TopicStub translation_of: Mozilla/Firefox/Releases/32 ---

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 {{cssxref("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 {{cssxref("box-decoration-break")}} and removed the non-standard {{cssxref("-moz-background-inline-policy")}}({{Bug(613659)}}).
Allowed {{cssxref("flex-grow")}} and {{cssxref("flex-shrink")}} to transition between zero and nonzero values ({{Bug(996945)}}).

HTML

Experimentally implemented, behind a pref, {{HTMLElement("img")}} {{HTMLattrxref("srcset", "img")}} 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:
- {{jsxref("Array.from()")}} ({{bug(904723)}}),
- {{jsxref("Array.prototype.copyWithin()")}} ({{bug(934423)}}),
- {{jsxref("Number.isSafeInteger()")}} ({{bug(1003764)}}).

Interfaces/APIs/DOM

The {{domxref("NavigatorLanguage.languages", "navigator.languages")}} property and {{event("languagechange")}} event have been implemented ({{Bug(889335)}}).
The {{domxref("Navigator.vibrate()")}} method behavior has been adapted to the latest specification: too long vibrations are now truncated ({{bug(1014581)}}).
The {{domxref("KeyboardEvent.getModifierState()")}} and {{domxref("MouseEvent.getModifierState()")}} methods have been extended to support the Accel virtual modifier ({{Bug(1009388)}}).
The {{domxref("KeyboardEvent.code")}} property have been experimentally implemented: it is disabled on release build ({{Bug(865649)}}).
Scoped selectors for {{domxref("Document.querySelector()")}} and {{domxref("Document.querySelectorAll()")}}, for example querySelector(":scope > li")have been implemented ({{Bug(528456)}}).
The experimental implementation of the {{domxref("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 {{domxref("InstallPhaseEvent")}} and {{domxref("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 {{domxref("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, {{domxref("MouseEvent.region")}} has been implemented ({{bug(979692)}}).
The {{domxref("CanvasRenderingContext2D.drawFocusIfNeeded()")}} method is now enabled by default ({{bug(1004579)}}).
The {{domxref("Navigator.doNotTrack")}} properties now returns '1' or '0', reflecting the HTTP value, instead of 'yes' or 'no' ({{bug(887703)}}).
New constraints for WebRTC's {{domxref("NavigatorUserMedia.getUserMedia", "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 }},
  ]
}
```

MathML

Add support for the {{MathMLElement("menclose")}} notation phasorangle.

SVG

No change.

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.