Mozilla发布支持WebM的浏览器原型版本

Mozilla今天宣布了其支持WebM特性的浏览器预览(1.9.3 Number 5)版本可以工作在Mac, Windows和Linux下，并支持32和64位版本，新版带来了WebM支持、HTML5视频全屏播放和一系列HTML5的表格、数据新特性，并进一步提升了JS性能，以下是更新列表和下载信息：

查看:Mozilla Developer Preview (1.9.3 Number 5)

User-facing changes

Aero Glass is now enabled for Windows Vista and Windows 7.
More parts of the new Windows theme have landed including new main button icons. Many more changes are coming in later releases.
The new Add-ons manager has landed. The UI for the new Add-ons manager is not yet complete.
You can now put tabs on top (View -> Toolbars -> Tabs on Top) although without most of the final UI this isn’t as useful as it could be.
Web-facing changes

Support for WebM is included with this build. (Try an example video on Youtube.)
When viewing HTML5 videos in full screen, we now use hardware acceleration for Windows (DX9) and Macs (OpenGL).
This is the first release of any browser that has proper support for parsing HTML5 according to the specification.
This build has early support for some HTML5 forms.
We now support the FormData interface, part of XHR level 2 spec.
We now support a Mozilla-specific CSS selector: -moz-any. Please see the post for examples, but this will be very useful in HTML5 contexts.
We now do Lazy Frame Construction which can vastly improve the performance of complex pages that add large numbers of elements to a page.
Lots of new JavaScript performance improvements have been made.
Platform Changes

An updated about:memory page shows you how memory is being consumed in the browser. This will improve with later updates to give even more useful data and cover more internal memory pools.
On the Mac we now support the Cocoa event model for NPAPI plugins. This is used by Flash 10.1 and the new Java plugin from Apple.
ChromeWorkers with jscytpes is now supported.