For instance in Firefox, type in "amazon.com" and that address remains in the address bar when you arrive at the amazon site. Try this in another browser (IE) and the address changes to "http://www.amazon.com". It does the same thing for any web site when you type in an address without the www. in the URL. How can I enable Firefox to display the complete redirected URL? I'm trying to test my 301 redirect for my website from domainname.com to www.domainname.com. The address bar show the redirected address in Safari, IE, OmniWeb... but not so in Firefox.