Mozilla Firefox 37.0 Beta 4 发布 首次在Beta分支提供64位测试版

　　基于Gecko 37内核的Mozilla Firefox 37 Beta 3今日发布，从Beta 2开始，FTP里多了一个win64目录，Firefox首次在Beta分支里提供64位测试版， 预计37版的正式发布时间在2015年4月左右。如果您有兴趣尝试下38、39版的64位程序，可以访问这里。

下载地址:

http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/37.0b4/

　　Changes for Web developersDeveloper Tools

　　Highlights:

　　Security panel in the Network Monitor

　　Animations panel in the Page Inspector

　　Support for running a custom build step in WebIDE

　　All devtools bugs fixed between Firefox 36 and Firefox 37.

　　CSS

　　display:contents is now activated by default (bug 1102374 and bug 1105369).

　　CSS multi-column layout is now working on element with display:table-caption (bug 1109571).

　　Relative positioning (position:relative) of table cells has been implemented (bug 35168).

　　Our experimental, preffed off by default, implementation of CSS Ruby, now supports vertical positioning using ruby-position (bug 1055665).

　　HTML

　　The value now also works when the link is opened in new tab (bug 1031264).

　　The '.' followed by the extension is now allowed in : when used, a file selector filters with this given extension to be proposed to the user (bug 826176).

　　JavaScript

　　The Map, Set, WeakMap and WeakSet constructors now ignore null iterable (bug 1092538).

　　The Map, Set, WeakMap and WeakSet constructors now supports monkey-patched prototype.set or prototype.add (bug 804279).

　　The Non-standard String.prototype.quote() method has been removed (bug 1103181).

　　The RegExp.prototype.flags property has been implemented (bug 1108467).

　　Several Array methods have been implemented for typed arrays as well:

　　The every() and some() methods (bug 1116390).

　　The find() and findIndex() methods (bug 1078975).

　　The fill() method (bug 1113722).

　　The indexOf() and lastIndexOf() methods (bug 1107601).

　　The join() method (bug 1115817).

　　The reduce() and reduceRight() methods (bug 1117350).

　　The reverse() method (bug 1111516).

　　The keys(), values(), and entries() methods (bug 1119217).

　　ES6 Proxy enumerate trap is implemented (bug 783829).

　　The configurable attribute of the Function.length property is now true per the ES6 specification (bug 911142).

　　The development of ParallelJS (PJS) has been discontinued due to the limited future prospects, little attention and code complexity. The experimental implementation that had been enabled only on the Nightly channel, including the Array.prototype.mapPar, filterPar and reducePar methods, has been completely removed.

　　Interfaces/APIs/DOM

　　The StereoPannerNodeWeb Audio node has been implemented (bug 1100349).

　　The Promise-based version of OfflineAudioContext is now available (bug 1087944).

　　The experimental, not activated by default, implementation of Service Workers progresses: ServiceWorkerGlobalScope.update() has been implemented bug 1065366.

　　The IndexedDB API can now be used in Web workers (bug 701634).

　　Our experimental implementation of WebGL 2.0 is going forward!

　　The WebGL2RenderingContext.getBufferSubData() method has been implemented to provide access to Buffer Objects (bug 1048731).

　　Some key names of KeyboardEvent.key are changed for conforming the latest DOM Level 3 Events spec. See the tables of KeyboardEvent.key values in MDN. The green cells are new values. And purple values are still ustable. Be careful if you use them (meta bug for these changes is bug 900372).

　　You can now use WebSockets in Workers (bug 1112054).

　　The Console interface is now working on ServiceWorker and SharedWorker. It was previously available but not working (bug 1058644).

　　MathML

　　No change.

　　SVG

　　SVG2's has been implemented (bug 1107584).

　　Audio/Video

　　No change.

　　Networking

　　WebSockets now supports the permessage compression method, if the server does support it (bug 792831).

　　Security

　　The usage of weak protocols or ciphers, like SSL 3.0 and RC4, are now logged in the console, to warn sites that are using it (bug 1092835).

　　Changes for add-on and Mozilla developersXUL

　　No change.