Download Mozilla Firefox 4.0 Beta 2 for Windows, Mac, Linux

Mozilla has released the second beta version of their latest Firefox 4.0 web browser and is now available for download for Windows, Mac OS X, and Linux based operating systems. The Firefox team has also planned to release new beta version every two or three weeks.

Firefox 4.0 beta 2 includes various features and improvements. You can test this beta version now and can also submit your feedback to the support team for improvements. Read more to find out all the new features and enhancements in this version.

Mozilla Firefox 4.0 Beta 2 – What’s New

Continued Evolution of the New Firefox Look – Tabs on Top

Mac and Windows users now have all their tabs on the top of the browser. We moved the tabs to the top to make it easier to focus on the Web content and easier to control the tools in your Web browser.
If you have Windows 7 or Windows Vista, the Menu bar is replaced with a single Firefox button so you get to the most used options with just one click.

App Tabs

There are some websites you visit many times throughout your day, such as your email, social networks, music or game sites. Now you can turn the websites you use most into App Tabs to easily find the ones you need.
App Tabs offer a better way to manage tabs, saving space on the tab bar and making it easy to find frequently used tabs.

New for Developers: Under the Hood

CSS3 Transitions:

The Firefox 4 Beta now has support for new CSS3 features like Transitions and Transformations, making it fun to add elegant animations to your websites.
To show what CSS3 Transitions can do, we added them to the Firefox 4 Beta “What’s New” page.

Retained Layers:

Adding Retained Layers in Firefox 4 Beta allows for super-fast scrolling on complex websites.

XPCOM Framework:

We made changes to the XPCOM framework that improves start up time when you load Firefox.

Mozilla Firefox 4.0 Beta 2 – Features

New Add-Ons Manager
Gives you more space to manage your Add-Ons, Themes and Plugins. Customizing your browser has never been easier!
HD Video
Watch hardware-accelerated, super-smooth, HD-quality HTML5 video on YouTube using the new WebM format.
Privacy improvements
Mozilla always puts privacy first, and this latest beta fixes flaws in some Web standards that could expose your browser history.
Crash Protection
Experience uninterrupted browsing (now available on all platforms) – when a plugin crashes or freezes, you can resume browsing by simply refreshing the page.
Performance
We know that performance is important. In this version, we focused on improving responsiveness at start-up and during page loads. This is just the beginning for performance improvements in Firefox 4.