In case you missed the video, here's a quick overview of what's new in this fairly major update:
- Available in more than 70 languages. (Get your local version!)
- Support for HTML5 elements including native support for Ogg Theora encoded video and Vorbis encoded audio. (Try it here!)
- Improved tools for controlling your private data, including a Private Browsing Mode.
- The ability to share your location with websites using Location Aware Browsing. (Try it here!)
Personally, I've never found Firefox to be slow, so I'm not sure this update will bring any noticeable performance improvements. Once you've had a chance to install and run the browser, hit the comments and let us know if it seems snappier.