This shown in my Firefox browser extensions list.
However it is no longer installed.
It's still there after i reinstall Firefox. Please tell me how i can get rid of this completely.
Please go to the location /usr/local/McAfee/SiteAdvisor/ and open the file "ui.zip". It will generate and show "Uninstall.app" for Site Advisor under Downloads. You can use the file to uninstall Site Advisor.