Firefox web browser | test the latest beta

The latest beta version of Firefox is now available as a preview release. Take it for a test drive and let us know what you think


Important Information

Please read before downloading

This is pre-release software: you may encounter compatibility problems with some websites and add-ons.

If you find a problem please let us know or file a bug.

For more details, read the release notes and known issues.

Free Download

3.5b4 for Mac OS X 10.4 and above

English US 17.3MB

Release Notes – Other systems and languages listed below.

via Firefox web browser | Help us test the latest beta.