Mozilla Firefox 38.0 Beta 2 今日发布，该版本将在今年5月份正式发布。除了继续优化对64位的支持外，最大的改进是原生支持Ruby字符。Ruby字符与Ruby语言无关，而是注音标示，是一种表意文字的音标印刷方式，广泛地运用于日文及中文，rubi是日本印刷业的用语。以前
Firefox浏览器支持注音标示需要安装扩展如HTML Ruby，如今Firefox 38默认启用了CSS Ruby，同时还引入了HTML5
ruby标签支持。
下载地址: http://dm-download02.mozilla.org/pub/mozilla.org/mozilla.org/firefox/releases/38.0b2/
Developer Tools Highlights: All devtools bugs fixed between Firefox 37 and Firefox 38. CSS Support for ruby-position and ruby-align have been added and is available by default (bug 1055676bug 1123917 and bug 1039006). The :unresolved pseudo-class have been implemented for custom elements (bug 1111633). The predefined style ethiopic-numeric now uses a space, instead of a dot, as suffix to match a recent change to the spec (bug 1120721). CSS transitions on generated content (with ::before and ::after) on both an inline and the block that splits them now start as expected by the spec (bug 1110277). The implementation of CSS Logical Properties made big progress. The following properties are available behind the layout.css.vertical-text.enabled flag (false by default): Direction-independant equivalents of width and height: block-size and inline-size (bug 1117983). Direction-independant equivalents of min-width and min-height: min-block-size and min-inline-size (bug 1117983). Direction-independant equivalents of max-width and max-height: max-block-size and max-block-size (bug 1117983). Direction-independant equivalents of margin-top, margin-right, margin-bottom and margin-left: margin-block-start, margin-block-end, margin-inline-start and margin-inline-end (bug 649142). Direction-independant equivalents of padding-top, padding-right, padding-bottom and padding-left: padding-block-start, padding-block-end, padding-inline-start and padding-inline-end (bug 649142). Direction-independant equivalents of border-top, border-right, border-bottom and border-left and their longhands for width, style and color: border-block-start, border-block-start-width, border-block-start-style, border-block-start-color, border-block-end, border-block-end-width, border-block-end-style, border-block-end-color, border-inline-start, border-inline-start-width, border-inline-start-style, border-inline-start-color, border-inline-end, border-inline-end-width, border-inline-end-style and border-inline-end-color (bug 649142). Direction-independant equivalents of top, right, bottom and left: offset-block-start, offset-block-end, offset-inline-start and offset-inline-end (bug 1120283).
How
CSS Transitions start has been modified to match a recent change of the
specifications, aiming at having an interoperable behavior between
browsers (bug 960465).
HTML Label
element doesn't dispatch event to label target element if interactive
content is found between the event target and the label (bug 229925). The <picture> element has been activated by default (bug 1017875).
JavaScript Interfaces/APIs/DOM The Fetch API fetch() method has been implemented (bug 1039846). BroadcastChannel has been implemented (bug 966439 and bug 1121420).
CanvasRenderingContext2D.clearHitRegions() has been implemented (bug 1119527).
HTMLAnchorElement.hash, HTMLAreaElement.hash, Location.hash, WorkerLocation.hash, and URL.hash now returns a percent-encoded fragment (bug 1093611 & bug 1122948).
Constants of KeyboardEvent.location, DOM_KEY_LOCATION_MOBILE and DOM_KEY_LOCATION_JOYSTICK, are dropped due to dropped from DOM Level 3 Spec (bug 936313. KeyboardEvent.code supports special keys on Sun keyboard on Linux, Android and Firefox OS. (bug 1020139)
KeyboardEvent.code is enabled on release build. (bug 1126673)
The TextEncoder() constructor has been changed to match the spec: when an invalid parameter is passed, the RangeError exception is now raised, rather than the erroneous TypeError (bug 1125766). The User Timing API, adding Performance.mark(), Performance.clearMarks(), Performance.measure(), and Performance.clearMeasures() has been implemented (bug 782751). The prefixed version of indexedDB, mozIndexedDB has been removed (bug 975699). The DOMContentLoaded event is no longer cancelable (bug 1134559). You can now use WebSockets in Workers (bug 1112054). The XMLHttpRequest.responseType and XMLHttpRequest.withCredentials properties can now be set before calling XMLHttpRequest.open() (bug 707484).
MathML No change. SVG No change. Audio/Video No change. Networking No change. Security In Firefox, the autocomplete=false attribute is now ignored when dealing with a login form (bug 1025703). RC4
is now disabled when using TLS, except for a few Web sites on a
whitelist. This whitelist is an interim measure while the Web sites are
fixed (bug 1124039). Web
sites needing to fallback to an insecure version of TLS to work are now
in a hardcoded whitelist, that will shrink with time (bug 1114816). The whitelist can be disabled by setting security.tls.insecure_fallback_hosts.use_static_list to false.
Changes for add-on and Mozilla developersAdd-on SDKHighlights sdk/context-menu@2 was implemented (bug 1070952).
sdk/addon/bootstrap was implemented (bug 1075541).
sdk/windows/loader was removed (bug 970135).
Fix for default language detection on Linux (bug 1114712). toolkit/loader now has opt-in module compatibility checking, which is enabled for all jpm add-ons (bug 1037235).
E10S Updates Details XUL No change. JavaScript code modulesDownloads.jsm DownloadTarget objects now have exists and size properties, allowing you to determine the existence of and the size of the download's target file on disk, as well as a new refresh() method, which asks that these values be updated.
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