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Mozilla Firefox 40.0 Beta 1 发布

7月18日杭州 OSC 源创会正在报名,送机械键盘和开源无码内裤 Mozilla Firefox 40.0 Beta 1 发布

Mozilla 发布 Mozilla Firefox 40.0 的 Beta 1 版本,基于 Gecko 40 内核开发,40 版本的最大改进是有望带来类似 Chrome 的多进程设计,这样可以提升内存的利用率从而提升性能和标签/窗口之间的稳定性(但最新的版本似乎并没有带来),新设计的标签页可以自动判断和展示您认为感兴趣的内容,正式版本预计8月11日发布。

Mozilla Firefox 40.0 Beta 1 发布

下载地址:

http://dm-download02.mozilla.org/pub/mozilla.org/mozilla.org/firefox/releases/40.0b1/

Web developersDeveloper Tools 方面的改进:

值得关注的更新:

  • Improvements to the Animations view

  • Get help from MDN for CSS property syntax

  • Edit filters in the Page Inspector

  • Web Console now shows messages from workers

  • Filter requests by URL in the Network Monitor

  • Many new context menu options in the Network Monitor

  • Show when network resources are fetched from the browser cache

  • Filter rules in the Page Inspector

其他:

  • Break at debugger; statements in unnamed eval sources

  • Copy URL/Open in New Tab context menu items for Debugger source list pane

  • console.dirxml support in the Web Console

  • Style Editor: "Open Link In New Tab" item added to stylesheet list

  • Inspector selector search now includes class/id results even without css prefix

  • Tooltips in box-model view saying which CSS rule caused the value

  • Switch between color unit format in the Inspector using Shift+click

  • Implement "Scroll Into View" menu item for the Inspector

  • Linkify url/id/resource attributes in the Inspector

  • IP address tooltip in the Network Monitor

完整改进: all devtools bugs fixed between Firefox 39 and Firefox 40 .

CSS

  • Prefixed rules ( -moz- ) for text-decoration-color , text-decoration-line , and text-decoration-style have been removed ( bug 1097922 ).

  • The property text-align now supports the match-parent value ( bug 645642 ).

  • In Quirks Mode, empty-cells now defaults to show , like in standard mode ( bug 1020400 ).

  • The -moz-orient non-standard property, used to style <meter> and <progress> element has been adapted for vertical writing-modes: the value auto has been dropped and the values inline and  block added, with inline being the new default value ( bug 1028716 ).

JavaScript

  • Unreachable code after return statement (including unreachable expression after semicolon-less return statements ) will now show a warning in the console ( bug 1005110 , bug 1151931 ).

  • Symbol.match has been added ( bug 1054755 ).

  • Passing an object which has a property named Symbol.match with a truthy value to String.prototype.startsWith , String.prototype.endsWith , and String.prototype.contains now throws a TypeError ( bug 1054755 ).

  • RegExp function returns pattern itself if called without new and pattern object has a property named  Symbol.match with a truthy value, and the pattern object's constructor property equals to  RegExp function. ( bug 1147817 ).

  • Support for the non-standard JS1.7 destructuring for-in has been dropped ( bug 1083498 ).

  • Non-standard initializer expressions in for...in loops are now ignored and will present a warning in the console. ( bug 748550 and bug 1164741 ).

  • /u{xxxxxx} Unicode code point escapes have been added ( bug 320500 ).

  • String.prototype.contains has been replaced with String.prototype.includes , String.prototype.contains is kept as an alias ( bug 1102219 ).

  • If the DataView constructor is called as a function without the new operator, a TypeError is now thrown as per the ES6 specification.

  • An issue regressed in Firefox 21, where proxyfied arrays without the get trap were not working properly, has been fixed. If the get trap in a Proxy was not defined, Array.length returned 0 and the set trap didn't get called. A workaround was to add the get trap even if was not necessary in your code. This issue has been fixed now ( bug 895223 ).

  • WeakMap.prototype and WeakSet.prototype have been updated to be just ordinary objects, per ES6 specification ( bug 1055473 ).

Interfaces/APIs/DOMNew APIs

  • The Push API has been implemented ( bug 1038811 ).

Web Animations API

Improvement in our experimental Web Animations implementation, mostley to match latest spec changes:

  • AnimationPlayer.currentTime now can also be set ( bug 1072037 ).

  • Animatable.getAnimationPlayers() , available on Element has been renamed to Element.getAnimations() ( bug 1145246 ).

  • Animation and AnimationEffect have been merged into the newly created KeyframeEffectReadOnly ( bug 1153734 ).

  • AnimationPlayer has been renamed to Animation ( bug 1154615 ).

  • AnimationTimeline is now an abstract class, with DocumentTimeline its only implementation ( bug 1152171 ).

CSSOM

  • The CSS Font Loading API is now enabled by default in Nightly and Developer Edition releases ( bug 1088437 ). It is still deactivated by default in Beta and Release browsers.

  • The CSSCharsetRule interface has been removed and such objects are no longer available in CSSOM ( bug 1148694 ). This matches the spec (recently adapted) and Chrome behavior.

WebRTC

  • WebRTC: the negotiationneeded event is now also sent for initial negotiations, not only for re-negotiations ( bug 1149838 ).

DOM & HTML DOM

  • When unable to parse the srcset ,  the HTMLImageElement.currentSrc method doesn't return null anymore but "" , as requested by the latest specification ( bug 1139560 ).

  • Like for images, Firefox now throttle Window.requestAnimationFrame() for non-visible <iframe> ( bug 1145439 ).

  • Navigator.taintEnabled is no longer available for Web workers ( bug 1154878 ).

  • The read-only properties MouseEvent.offsetX and MouseEvent.offsetY have been implemented bug 69787 .

Web Audio API

New extensions to the Web Audio API :

  • The AudioContext.state and  AudioContext.onstatechange properties as well as the methods AudioContext.suspend() , AudioContext.resume() , and AudioContext.close() have been added ( bug 1094764 ).

  • AudioBufferSourceNode now implements the AudioBufferSourceNode.detune k-rate attribute ( bug 1153783 ).

Web Workers

  • Slight improvement in our Service Worker API : the update() method has been moved from ServiceWorkerGlobalScope to ServiceWorkerRegistration ( bug 1131350 ).

  • ServiceWorkerRegistration is now available in Web workers ( bug 1131327 ).

  • DataStore is now available in Web workers ( bug 949325 ).

IndexedDB

  • IDBTransaction are now non-durable by default ( bug 1112702 ). This favors performance over reliability and matches what other browsers are doing. For more information, read our durability definition .

Dev Tools

  • The property Console.timeStamp has been added ( bug 922221 ).

JavaScript 代码模块

  • Dict.jsm has been removed bug 1123309 . Use Map instead.

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