Mozilla Products

The award-winning Firefox Web browser has security, speed and new features that will change the way you use the Web. Don’t settle for anything less.

The Best Firefox Yet

With more than 15,000 improvements, Firefox 3 is faster, safer and smarter than ever before.

• Free Download 3.0.6 for Windows English (US) (7.1MB)

Release Notes - Other Systems and Languages

• Firefox vs. IE

Welcome to the Cutting Edge

The Web is all about innovation, and Firefox 3 sets the pace with dozens of new features, including the smart location bar, one-click bookmarking and blindingly fast performance.

View the top new features.

Smart Location Bar

The Safest Web Browser

Simply put, your online security is our top priority. Firefox includes strict anti-phishing and anti-malware measures, plus easy ways to tell the good guys from the bad like our new one-click site ID info. And, thanks to our open source process we have thousands of security experts around the globe working around the clock to keep you (and your personal information) safe.

View all security features.
Learn more about Firefox security.

One-click Site ID

We’re Here to Help

In the end, it’s all about you being able to do what you need to do on the Web. And with features like built-in spell checking, session restore and full zoom, nobody makes it easier, helps you work better or saves you more time than Firefox.

View all productivity features.

Full Zoom

One Size Doesn’t Fit All

Everybody uses the Web differently, so why should your browser be exactly like the next guy’s? Whether you’re into chatting, cooking or coding, Firefox has more than 5,000 add-ons to help you customize it to fit your exact needs.

View all customization features.
Learn more about Firefox customization.

Add-ons Manager

See How We Stack Up

We’ve told you about what makes Firefox great, but how do we compare against Internet Explorer? Check out our handy browser comparison chart to see for yourself.

Compatible with modern Web pages and technologies
Active security features and the industry’s fastest response times
Thousands of free ways to personalize your online experience
Superior speed and performance
100% free and open source software

Enjoy safe, fast and easy email, Mozilla-style. The Thunderbird email client includes intelligent spam filters, powerful search and customizable views.

Thunderbird 2

Mozilla’s Thunderbird 2 email application is more powerful than ever. It’s now even easier to organize, secure and customize your mail.

• Download Thunderbird 2.0.0.19 for Windows, English (US) (6.4MB)

Release Notes - Other Systems & Languages

Keep Your Vital Information Organized

Thunderbird 2 features many new enhancements to help you better manage your unruly inbox, and stay informed. Thunderbird 2 scales to the most sophisticated organizational needs while making it easy to find what you need.

Secure and Protect Your Mail

Mozilla has bolstered Thunderbird’s acclaimed security and privacy measures to ensure that your communications and identity remain safe. It’s like having your own security guard online.

Get Your Mail, Your Way

Thunderbird allows you to customize your email to suit your specific needs whether it’s how you search and find messages or listening to music right out of your inbox.

Learn more about Thunderbird 2...