Firefox 4 is officially here and I am sure it’s already downloading at the back if you use Firefox often. In case It’s not showing up for you, Go to Help > Check for Update and you should see the notification for FF 4. Another good thing is it will let you know which add-ons will not work with FF 4 and you may skip the download and update.
And the very new thing about the welcome screen which you will see after the update is complete, is Mozilla asking you to Join the party and asking you to stay in touch about FireFox.
