You have or had an extension installed (NET_mmhpset) that has changed the user agent from Firefox/3.6.3 to Firefox/3.0.10. You can check the '''general.useragent''' prefs on the '''about:config''' page. You can open the ''about:config'' page via the location bar, just like you open a website. Filter: '''general.useragent''' If ''general.useragent'' prefs are bold (user set) then you can right-click that pref and choose ''Reset''. See [[Web sites or add-ons incorrectly report incompatible browser]] and [[Finding your Firefox version]] See also http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default --- How did you clear the cache? Make sure that you have selected [[Clear Recent History]] to clear the Browser History.