You have or had an extension installed (MegaUpload toolbar) that has changed the user agent from Firefox/3.6.4 to Firefox/2.0.0.4. You can see the Firefox version at the top and the user agent at bottom of the "Help > About" window (Mac: Firefox > About Mozilla Firefox). 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 --- To see all the History and Cookie options, select: Firefox > Preferences > Privacy > History: Firefox will: "Use custom settings for history" - See [[Options window - Privacy panel]] Firefox > Preferences > Privacy > History: "Remember search and form history" See also [[Form autocomplete]]