Be the first and download it on your machine today; chicks love the guy who has the newest browser on their computer.
The Firefox 4 Beta is not stable with tons of add-ons so if you rely and live on your add-ons, stick to the more stable 3 series for a bit.
Windows, Linux and OS X machines can all download?the new browser and use the feedback icon at the top to send any?information Mozilla should know about add-ons not working or other issues.
Boasting more privacy features and support for WebM, you can see why?Firefox 4 is the way to go for your?browsing needs.? Check out the full feature upgrade?chart here.