Mozilla has released the new version Firefox 3.5. You can download free upgraded version of Mozilla Firefox 3.5 from their official site. Here is a video tour for the latest Firefox 3.5 and you can learn what is new inside the latest Firefox 3.5 Version. Not only download but if you are a developer and can built add-ons for Firefox 3.5 than you can take part in the contest "Firefox 3.5. Make the Next Great Web Experience!"