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Firefox 4 Beta 2 Released



  172 Cup
http://www.mozilla.com/en-US/firefox/all-beta.html

What’s New in this Firefox 4 Beta

Firefox 4 Beta 2 is available in 24 languages.
Tabs are now on top by default on Windows and OSX - Linux will be changing when the theme has been modified to support the change.
You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu.
Web developers can animate content using CSS Transitions.
Responsiveness and scrolling improvements from the new retained layers layout system.
JavaScript speed improvements due to engine optimizations.
Changes to how XPCOM components are registered in order to help startup time and process separation.
See the complete changelist from the previous beta.

As well as these features from previous Firefox 4 Betas:

You can search for and switch to already open tabs in the Smart Location Bar
New Addons Manager and extension management API (UI will be changed before final release)
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.
Native support for the HD HTML5 WebM video format.
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.

Code:
Using Direct2D

By default, Direct2D and DirectWrite are turned off. Steps to turn it on:

    Enter 'about:config'
    Click through the warning, if necessary
    Enter gfx.font in the 'Filter' box
    Double-click on 'gfx.font_rendering.directwrite.enabled' to set it to true
    Below this, right click and select New > Integer to add a pref setting
    Enter 'mozilla.widget.render-mode' for the preference name, 6 for the value
    Restart

Some good sites

Some good sites that show off the advantages of hardware acceleration well are the following:

http://people.mozilla.com/~vladimir/demos/photos.svg (particularly noticable when sizing up the photos)
http://srufaculty.sru.edu/david.dailey/svg/balloon.svg
http://srufaculty.sru.edu/david.dailey/svg/clipdrag12.svg
http://maps.google.com/ (zoom in and out once, to make sure that images are cached, and then see the smooth zoom in/out animation in the D2D build)
 


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