On Thursday, Mozilla.org released version 9.0.1 of its Firefox web browser. The new version stands as a 30.8 megabyte download (via MacUpdate) and adds the following fixes and changes:

- Added Type Inference, significantly improving JavaScript performance.

- Improved theme integration for Mac OS X Lion.

- Added two finger swipe navigation for Mac OS X Lion.

- Added support for querying Do Not Track status via JavaScript.

- Added support for font-stretch.

- Improved support for text-overflow.

- Improved standards support for HTML5, MathML, and CSS.

- Fixed several stability issues.

- Fixed security issues.

- Fixed add-on crashes.

Firefox 9.0.1 requires an Intel-based Mac running Mac OS X 10.5 or later to install and run.