Clear the cache and the cookies from sites that cause problems. "Clear the Cache": * Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now" "Remove Cookies" from sites causing problems: * Tools > Options > Privacy > Cookies: "Show Cookies" See also: * http://kb.mozillazine.org/Websites_report_cookies_are_disabled ---- There are other things that need your attention. Your above posted system details show outdated plugin(s) with known security and stability risks that you should update. *Shockwave Flash 10.0 r32 Update the Flash plugin to the latest version. *https://support.mozilla.com/kb/Managing+the+Flash+plugin *http://kb.mozillazine.org/Flash *http://www.adobe.com/software/flash/about/