March 22nd, 2011
Mozilla, a global, nonprofit organization dedicated to making the Web better, is proud to release Mozilla Firefox 4, the newest version of the popular, free and open source Web browser. Firefox puts users in control of their Web experience, providing a streamlined user interface, fun new features, a boost in speed and support for modern Web technologies.
Firefox 4 is available to download for Windows, Mac OS X and Linux in more than 80 languages. Firefox 4 will also be available on Android and Maemo devices soon.
The latest version of Firefox introduces a sleek new look that lets Web content take center stage. With features like App Tabs and Panorama, Firefox makes it easier and more efficient to navigate the Web. Firefox delivers industry-leading privacy and security features like Do Not Track and Content Security Policy to give users control over their personal data and protect them online.
Firefox Sync gives users access to their Awesome Bar history, bookmarks, open tabs and passwords across computers and mobile devices. Firefox also offers hundreds of thousands of add-ons, extensions and Personas and a new Firefox Add-ons Manager to make it easy for users to manage and discover add-ons to customize their Web experience.
Firefox supports modern Web technologies, including HTML5. These technologies are the foundation for building amazing websites and Web applications. Go to Web O’ Wonder and check out the incredible online experiences developers can now create.
What’s New in Firefox 4:
Fastest Firefox Ever
- Performance: Firefox is up to six times faster than the previous release. With improved start-up and page load times, speedy Web app performance and hardware accelerated graphics, Firefox is optimized for rich, interactive websites.
- App Tabs: give a permanent home to frequently visited sites like Web mail, Twitter, Pandora, Flickr.
- Switch to Tab: easily find and switch to any open tab from your Awesome Bar without opening duplicate tabs.
- Panorama: drag and drop tabs into manageable groups to save time while navigating many open tabs.
Private and Secure Synchronization
- Firefox Sync: access your Awesome Bar history, bookmarks, open tabs, passwords and form data across multiple computers and mobile devices.
- New Add-ons Manager: easily discover and install more than 200,000 add-ons to customize the features, functionality and look of Firefox.
Private and Secure
- Do Not Track: Firefox is leading the Web towards a universal standard Do Not Track feature that allows users to opt-out of tracking used for behavioral advertising.
- Firefox puts privacy first, fixing flaws in some Web standards to prevent others from accessing your browser history.
- HTTP Strict Transport Security (HSTS): automatically establishes secure connections to stop “man in the middle” attacks and keep sensitive data safe from interception during the log-in process.
- Content Security Policy (CSP): prevent cross-scripting attacks by allowing sites to explicitly tell the browser which content is legitimate.
Cutting Edge Tools for Web Developers:
- HTML5 support in Firefox includes hardware accelerated, high-definition video (WebM), 3D graphics, offline data storage, professional typography, touchscreen interfaces and the Mozilla Audio API to help create visual experiences for sound and more.
- Firefox 4 also improves existing tools like CSS, Canvas and SVG to enable developers to make exciting Web pages.
- Firefox provides uninterrupted browsing when there is a crash in the Adobe Flash, Apple QuickTime or Microsoft Silverlight plugins. If one of these plugins crashes or freezes, it won’t affect the rest of Firefox. Simply reload the page to restart the plugin.
For more information: