Mozilla releases Firefox 4.0 web browser

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Date: Wednesday, March 23rd, 2011, 03:52
Category: News, Software

elfirefox

Late Tuesday, Mozilla.org released version 4.0 of its Firefox web browser. The new version stands as an 26.8 megabyte download offered the following fixes and changes:

– Firefox 4 is available in over 80 languages

– Uses J├ĄgerMonkey, a new, faster JavaScript engine that is up to six times faster than Firefox 3.6

– Support for the Do Not Track (“DNT”) header that allows users to opt-out of behavioural advertising

– Firefox Sync is included by default, allowing you to securely synchronize between multiple computers and mobile devices

– Certain graphics rendering operations are now hardware-accelerated using Direct3D 9 on
Windows XP, Direct3D 10 on Windows Vista and 7, and OpenGL on Mac OS (OpenGL on Linux will be supported in the future)

– Direct2D Hardware Acceleration is now on by default for Windows 7 users

– WebGL is enabled on all platforms that have a capable graphics card with updated drivers

– Native support for the HD HTML5 WebM video format, hardware accelerated where available

– Firefox button has a new look for Windows Vista and Windows 7 users

– Tabs are now on top by default on Windows, Mac OS X, and Linux

– You can search for and switch to already open tabs in the Smart Location Bar

– The stop and reload buttons have been merged into a single button on Windows, Mac OS X, 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 OS X when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins

– You can turn any tab into an “App Tab” by right-clicking on it and selecting “Make into App Tab” from the context menu

– The default homepage design has been refreshed

– Overhaul of the bookmarks and history code, enabling faster bookmarking and startup performance

– Per-compartment garbage collection is now enabled, reducing work done during complex animations

– Additional polish for the Firefox Add-ons Manager

– Improved web typography using OpenType with support for ligatures, kerning and font variants

– Web developers can animate content using CSS Transitions

– Responsiveness and scrolling improvements from the new retained layers layout system

– HTML5 Forms API makes web based forms easier to implement and validate

– Support for the new proposed Audio Data API

– Support for HSTS security protocol allowing sites to insist that they only be loaded over SSL

– A new feature called Panorama gives users a visual overview of all open tabs, allowing them to be sorted and grouped

– An experimental API is included to provide more efficient Javascript animations

– Firefox now supports the HTML5 video “buffered” property

– Changes to how XPCOM components are registered in order to help startup time and process separation

– 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

– CSS Transitions are partially supported

– Core Animation rendering model for plugins on Mac OS X. Plugins which also support this rendering model can now draw faster and more efficiently

– 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

– Web authors can now get touch events from Firefox users on Windows 7 machines

– A new way of representing values in JavaScript that allows Firefox to execute heavy, numeric code (used for things like graphics and animations) more efficiently

Firefox 4.0 requires an Intel-based Mad and Mac OS X 10.5 or later to install and run.

If you’ve tried the new version and have any feedback, let us know.

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