Mozilla has offered a sneak peak at some of the new features that will be in version four of the Firefox browser.

The primary goals for Firefox 4 will be making a browser:

• Fast: making Firefox super-duper fast
  
• Powerful: enabling new open, standard Web technologies (HTML5 and beyond!),
• Empowering: putting users in full control of their browser, data, and Web experience.
  

If you have about an hour, you can view the video presentation on the upate at: http://videos.mozilla.org/serv/air_mozilla/firefox4.ogg



Sources:
http://beltzner.ca/mike/2010/05/10/firefox-4-fast-powerful-and-empowering/
http://www.webuser.co.uk/news/top-stories/460109/firefox-4-plans-revealed-by-mozilla