Mozilla Firefox is a fast, full-featured Web browser. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows you more of the page than any other browser and a number of additional features that work with you to help you get the most out of your time online.
Mozilla Firefox 4.0 Beta 1 is the first version of the Firefox 4 Beta, based on the Gecko 2.0 Web platform. Please read section What's New Features below for more detailed information about what's new in this version of the beta release, as well as the known issues.
Firefox 4 Beta (version 1) considered to be stable and safe to use for daily web browsing, though the features and content may change before the final product release. At this time many Add-ons may not yet have been tested by their authors to ensure that they are compatible with this release. If you wish to help test Add-on compatibility, please install the Add-on Compatibility Reporter - your favorite Add-on author will appreciate it!
Note: If you want to test Add-Ons with Firefox 4 Beta, you will need to install the Add-On Compatibility Reporter first.
Download Mozilla Firefox:
Download Mozilla Firefox 4.0 Beta 1 from website below
• Download Mozilla Firefox 4.0 Beta 1
• Download Mozilla Firefox 4.0 Beta 1 for Windows
What's New Features
• Tabs are now on top by default on Windows only - OSX and Linux will be changing when the theme has been modified to support the change.
• On Windows Vista and Windows 7 the menu bar has been replaced with the Firefox button.
• 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.
Source:
• Firefox 4.0 Beta 1 Release Notes
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