Mozilla is jumping on the latest privacy bandwagon, with developers already working hard to ensure a new private browsing feature ships in Firefox 3.1, due to arrive at the end of 2008.Private browsing, or “porn mode” as it’s often referred to, since that’s one of the more obvious uses, restricts the information that your browser gathers as you visit websites. Cookies are rejected, URLs are kept out of the browser history, forms are not auto-filled and pages are not cached.