Click Tools | Add-ons | Plugins. In there, find '''My Web Search '''and click "Disable". "My Web Search" is adware and will feed you ads until the cows come home if you let it. See http://en.wikipedia.org/wiki/My_web_search ---- Please visit the [http://www.mozilla.com/en-US/plugincheck/ Plugins Check] page and update where necessary. Some of your Plugins are seriously outdated and expose your system to exploits. See: http://www.adobe.com/support/security/advisories/apsa11-02.html ---- Most important of all, click '''Help '''| '''Check For Updates''' and update Firefox to 3.6.17 There was a security breach at Comodo which is an SSL certificate provider recently whereby a number of fraudulent certificates were inadvertently issued. These allow a hacker to impersonate any site including online banking and the Firefox version you're running at the moment will not warn you that the site is a fake. The fraudulent certificates were blacklisted in v3.6.17 and beyond. See http://blogs.comodo.com/it-security/data-security/the-recent-ra-compromise/