Firefox 29 для разработчика

Firefox 29 был выпущен 29 апреля 2014 года. Список ключевых изменений, предоставленный в данной статье будет полезен не только веб-разработчикам, но и Firefox-, Gecko-разработчикам и разработчикам дополнений.

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Изменения для разработчиков

Инструменты разработчика

Важные изменения:

Vastly improved web console - Arrays are shown inline without clicking to bring up in the right inspector, window objects show their url, etc.
Added the console API to Web Workers (bug 620935). Now you can log messages to the Web Console from Web Workers.
The Network Monitor tool now shows performance statistics using pie charts (баг 846599).
On the Inspector, preview tooltips of CSS transforms are now available (баг 726427).
DOM elements seen in the debugger and console can be removed or inspected directly, via the new buttons to the right of the variable listing.
A CSS source map is now supported by the Style Editor (баг 926014).
Autocompletion of CSS properties and values has been added to the Style Editor (баг 717369).

Больше деталей и изменений смотрите в блоге Mozilla Hacks.

CSS

CSS variables have been implemented (баг 773296). Mozilla Hacks article can be found here. They are enabled by default only for non-release builds (on release builds flip the pref layout.css.variables.enabled to true if you want to play with them).
Добавленна подержка visibility: collapse в
Flexboxes (баг 783470).
Свойство box-sizing больше не нуждается в префиксе (баг 243412).
The will-change property, a hint to that something will animate has been added. The preference layout.css.will-change.enabled must be switched to true to enable it. (баг 940842)
Scientific exponential notation, like 3e1 or 10e+0, is now supported for <number> values (баг 964529).
Тип изображения <gradient> теперь поддерживается в border-image (баг 709587).
The touch-action property has been implemented. It is not activated by default; the layout.css.touch_action.enabled pref controls it. (баг 795567)

HTML

<input type=color> и <input type=number> доступны по умолчанию.
Support for the non standard <pre cols> has been removed, as well as the layout effect of <pre wrap> . Both effects can, and should, be achieved using CSS. (баг 949879)

JavaScript

Реализованы новые методы строк в ECMAScript 6: String.prototype.codePointAt() и String.prototype.fromCodePoint() (баг 918879).
The ECMAScript Internationalization API (ECMA-402) has been implemented and is now enabled by default in Firefox Desktop (баг 853301):
- New objects in the new Intl object namespace:
- The following methods of String, Number and Date have been updated to include the locales and options arguments per ECMA-402:
To match the updated ECMAScript6 draft specification, the Map and Set objects now treat -0 and +0 as the same when checking for key and value equality.
Promise has been enabled by default (баг 918806).
Completed generators now returns an IteratorResult object instead of throwing (баг 958951).
A malformed JSON string parsed by JSON.parse() now yields a more detailed error message containing the line and column number that caused the parsing error. This is useful when debugging large JSON data.

Интерфейс/APIs/DOM

A new type of workers, SharedWorker, is now available by default (баг 924089).
The URLUtils interface now supports the searchParams property returning a URLSearchParams object, allowing to modify the search params of an URL (баг 887836). The URLSearchParams constructor allows easier parsing of query strings.
The Worker.onLine property is now supported, allowing to know the online/offline status in workers (баг 925437).
As part of the implementation of Web Components, the HTMLShadowElement interface has been implemented behind the dom.webcomponents.enabled. Flip it to true if you want to use it. (баг 887538).
The read-only property HTMLIFrameElement.sandbox is no longer a string but an HTMLSettableToken (баг 845057).
On HTMLCanvasElement.getContext(), the value moz-webgl is no longer supported. Use the standard webgl value (баг 913597).
The constructor for ImageData has been added. This interface can be used in a Worker. (баг 959958)
The property location.origin is now available in workers (баг 964148).
The ValidityState.badInput property has been implemented (баг 827161).
The deprecated Window.pkcs11 property has been removed; it was returning null since Firefox 3.0.14. (баг 964964)
The Node.cloneNode() and Document.importNode() methods take the Boolean deep argument. Until now, if omitted, these methods acted as if the value of deep was true. But this behavior has been changed as per the latest spec, and if omitted, the methods will act as if the value was false. (баг 937461)
Window._content is no longer available to Web content (баг 946564).
URLUtils.port behavior has been slightly changed: set to '' will set it to the default port associated with the protocol, and 0 to 0. (баг 930450)
Document.referrer is now based on the incumbent script (баг 887928).
Gamepad API включён по умолчанию (баг 878828).

MathML

Без изменений.

SVG

Без изменений.

Безопасность

Реализована экспериментальная директива CSP 1.1 hash-source. Чтобы воспользоваться этой функцией, настройка security.csp.experimentalEnabled должна быть установлена в положение true (баг 883975).

Изменения для разработчиков дополнений

Совместимость дополнений с Australis - Это существенное изменение темы Firefox, что влияет на большинство расширений, связанных с пользовательским интерфейсом Firefox.

Об изменениях, не касающихся Austrlis, будет объявлено позднее.

См. также

Совместимость сайтов с Firefox 29