You may have a user agent that is corrupted and that identifies you as Firefox/3.5.14 *Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.14) Gecko/20101001 Firefox/3.5.14 (.NET CLR 3.5.30729) See: *https://support.mozilla.org/kb/Finding+your+Firefox+version *https://support.mozilla.org/kb/Websites+or+add-ons+incorrectly+report+incompatible+browser *http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default

I take it you mean Firefox 9.0.1. There are no Firefox versions that uses a year like 2012 and the last Firefox releases 9.0.1 and 3.6.25 were released Dec 21 and 20 of 2011.