Welcome to Welcome to Firefox 3.5

Thanks for supporting Mozilla's mission of encouraging openness, innovation and opportunity on the Web!

Watch This!

Firefox 3.5 is the first browser to support open video formats, allowing movies to become part of today’s dynamic web pages without requiring a plug-in. Go ahead – give it a try.

This video brought to you by Dailymotion, proud supporters of open video.

Need Help?

Our Support site has plenty of answers, plus a live chat feature to guide you through any tricky spots.

Visit Firefox Support

Time to Get Personal

There are thousands of totally free ways to customize your Firefox to fit exactly what you like to do online.

Explore Add-ons

Be the difference! Learn how you can help Mozilla better our communities during Mozilla Service Week.