Firefox 45 for developers

Install Firefox Nightly

Firefox 45, based on Gecko 45, will ship in March 2016. This article provides information about the changes in this release that will affect developers. Nightly builds of what will become Firefox 45 are currently available on the Nightly channel.

Изменения для Веб разработчиков

Инструменты разработчика

Без изменений.

HTML

• Настройки безопасности содержимого можно устанавливать прямо на html элемент <meta> (баг 663570).
• Атрибут referrer переименован в  referrerpolicy в тегах <image>, <area>, <a>, and <iframe> (баг 1187357).

CSS

• В word-spacing можно указывать значения в процентах (баг 1038663).
• Добавлены inline-start и inline-end в float and clear (баг 1122918). Они активированы по умолчанию в Nightly и Aurora (Dev edition), а также в Firefox OS; чтобы активировать их в текущем релизе или бете, нужно установить значение layout.css.float-logical-values.enabled в true (about:config).
• Реализованы The text-emphasis, text-emphasis-style, text-emphasis-color, и text-emphasis-position; по умолчанию они недоступны, чтобы активировать их (установите значение layout.css.text-emphasis.enabled в true (баг 1040668).
• Алиас -webkit-transform related CSS properties (баг 1179444).
• Support -webkit-min-device-pixel-ratio in CSS media queries (nonstandard version of "min-resolution") (баг 1176968).
• Remove pref layout.css.ruby.enabled (баг 1202940).
•  [css-grid][css-flexbox] Implement grid/flex layout for <fieldset> (баг 1230207).
• Support -webkit-box styling, as aliases for modern CSS flexbox (behind a pref) (баг 1208635).
• Our experimental implementation of CSS Grids has been improved:
  • Gutters, that is the grid-column-gap, grid-row-gap, and grid-gap properties are now supported (баг 1176792).
  • The implied minimum size of grid Items, that is the special min-width and min-height auto behavior has been implemented (баг 1176775).
  • Percentage lengths for grid item are now calculated correctly (баг 1163435).
  • align-self and justify-self are now supported on grid layouts (баг 1151213).
  • align-content and justify-content are now supported on grid layouts (баг 1151214).
  • An empty grid now still has one explicit grid line in each axis (баг 1215099).
  • Negative line numbers should start counting from the end of the explicit grid (баг 1215957).
  • Make our "Implicit Named Areas" handling match the spec (баг 1215182).
  • Tweak the implementation of Grid Placement Conflict Handling (due to a spec change) (баг 1211260).
  • min-height is not applied to grid container (баг 1229165).
  • Grid item with 100%-wide image ends up hugely tall  (баг 1227285).
  • Fix grid-auto-flow: dense algorithm error  (баг 1228984).
  • abs.pos. child spanning from an 'auto' start position to an end line should end on the start side of the gutter  (баг 1230695).

JavaScript

• Expression closures are deprecated and will now present a warning in the console (баг 995610).
• String.prototype.replace does not restore RegExp static properties after executing function parameter anymore (баг 1226936).
• The ES2016 (ES7) Object.entries() and Object.values() methods have been implemented in non-release channels (баг 1208464).
• The ES2015 (ES6) block-level functions have been implemented (баг 1071646).

Interfaces/APIs/DOM

DOM & HTML DOM

• Для улучшения совместимости реализовано нестандартное свойство Node.innerText (баг 264412).
• <img srcset> реагирует на изменения размеров/области просмотра (баг 1166138).

WebGL

Без изменений.

IndexedDB

Без изменений.

Service Workers

• Реализованы Clients.get() и FetchEvent.clientId (баг 1222464.)
• Реализовано Clients.openWindow() (баг 1172870.)

WebRTC

Без изменений.

New APIs

Без изменений.

Разное

• Web Speech Synthesis API has been implemented on Firefox Desktop (баг 1003439).Реализован API
• The Window.onstorage event handler has been added.
• The interface ComputedTiming have been added to our experimental implmenation of Web Animations API (баг 1108055).

No change.

MathML

No change.

SVG

• SVG stroke hit-testing is buggy when cairo is the Moz2D backend (баг 676001).
• Unable to interact with elements who have large transform / translate values (баг 1217012).

Audio/Video

• Fixed: Regression (since Firefox 41) whereby audio playback was stuttering due to duration time rounding errors (баг 1222866.)

HTTP

No change.

Networking

No change.

Security

• Support of the child-src CSP policy directive has been implemented (баг 1045891).
• EV certificates with a validity greater than 27 months are now considered and handled as DV certificates (баг 1222903).

Changes for add-on and Mozilla developers

Interfaces

Без изменений.

XUL

Без изменений

JavaScript code modules

Без изменений.

XPCOM

Без изменений.

Other

• WebIDL constructors could be called without the new operator in chrome context..  Now such code will raise a TypeError like in Web content since Firefox 30. For example, var req = XMLHttpRequest(); need to be var req = new XMLHttpRequest();.

See also

• Site Compatibility for Firefox 45

Older versions