Di seguito le note di rilascio fornite a corredo con questa versione Beta:
– Significant API improvements are available for JS-ctypes, a foreign function interface for extensions.
– The stop and reload buttons have been merged into a single button on Windows, Mac and Linux.
– The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you’d like).
– Crash protection for Windows, Linux, and Mac when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins.
– CSS Transitions are partially supported.
– Full WebGL support is included but disabled by default at this time.
– Core Animation rendering model for plugins on Mac OS X. Plugins which also support this rendering model can now draw faster and more efficiently.
– An experimental Direct2D rendering backend is available on Windows, turned off by default.
– Web developers can use Websockets for a low complexity, low latency, bidirectional communications API.
– Web developers can update the URL field without reloading the page using HTML History APIs.
– More responsive page rendering using lazy frame construction.
– Link history lookup is done asynchronously to provide better responsiveness during pageload.
– CSS :visited selectors have been changed to block websites from being able to check a user’s browsing history.
– New HTML5 parser.
– Support for more HTML5 form controls.
Per il download di Firefox 4.0 Beta 1 potete fare riferimento al seguente link.