Meet the New Firefox
Featuring a new interface, more developer tools and other goodness.
Episode 4: A New Look
Firefox 4 Beta includes an updated Windows and Mac interface that's sleeker and easier to use. (Linux version is coming soon!)
New Tab Location
Tabs are given top visual priority for more efficient and intuitive browsing.
Switch to Tab
Navigate more easily by switching to open tabs from your Awesome Bar.
Firefox Button
All your menu items are in a single button for easy access and reduced clutter.
Apps Tab
Take sites you always keep open—like Web mail--off your tab bar and give them a permanent home in your browser.
Feature Spotlight
Stay in Sync
Synchronize your settings, passwords, bookmarks, history, open tabs and other customizations across multiple devices so you can take Firefox with you wherever you go.
Organize Your Tabs
Reclaim your browser from tab clutter! Drag and drop your tabs into manageable groups that you can organize, name and arrange in a fun and visual way.
Manage Your Add-ons
An easier way to manage your add-ons and discover new options for personalizing your browsing.
Under the Hood
WebM and HD Video
As pioneers of HTML5 video standards, Firefox also supports the WebM format so you can watch open HD quality video.
Protecting Your Privacy
Firefox puts your privacy first, fixing flaws in some web standards that allow bad guys to snoop around and expose your browser history.
New JS values
Changes to the C++ representation of JavaScript values allow Firefox to execute heavy, numeric code more efficiently, resulting in cleaner graphics and a better browsing experience.
Multi-touch Support
Firefox now integrates multi-touch support for Windows 7, enabling you to interact with your browser in a whole new way.
new Audio API
Firefox is changing the way media is integrated on the web: exposing the raw audio data housed within the <video> and <audio> elements in HTML5 makes it easy for developers to use JS to read and write audio data.
Retained layers
Experience super fast scrolling on complex web pages. Simply awesome.
XPCOM
Firefox starts up even faster thanks to XPCOM module improvements that pave the way to a better extensions framework.
Stylin’ Pages with CSS3
Support for new CSS3 features like Transitions and Transformations makes it easy to add elegant animations to Web pages. Learn more
HTML5 Support
A new HTML5 parser and full support for web video, audio, drag & drop, and file handling means Firefox 4 is ready to run the best web apps of both today and tomorrow.
Web Console
With this experimental analysis tool for modern sites, Firefox allows you to peek under the hood of dynamic web pages.
JetPack SDK (Making Add-on Development Easier)
Add-ons can be installed without restarting the browser, and can be developed more easily using the new JetPack SDK and js-ctypes.
new Direct2D Hardware Graphics Acceleration (Windows only)
Experience super-fast graphics acceleration with Direct2D, now enabled by default, on DirectX 10 supported hardware.
Crash Protection
Firefox provides uninterrupted browsing for Windows, Linux, and now Mac when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins. If one of these commonly-used plugins crashes or freezes, it won’t affect the rest of Firefox. Instead, you can simply reload the page to restart the plugin and try again. Learn more about plugins.
new HSTS
Sites can now keep attackers from intercepting sensitive data while accessing the site by telling Firefox to automatically establish secure connections to their servers (https).
