http://www.mozilla.org/mirrors.html
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a2) Gecko/20040608 Firefox/0.8.0+
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a2) Gecko/20040609 Firefox/0.8.0+
http://bugzilla.mozilla.org/show_bug.cgi?id=148994