You can set what new cookies can be installed and delete existing cookies in your browser. The process varies from browser to browser. Google Chrome To prevent new cookies from being installed and delete existing cookies: https://support.google.com/chrome/answer/95647?hl=en Safari To prevent new cookies from being installed and delete existing cookies: http://help.apple.com/safari/mac/8.0/#/sfri11471 Internet Explorer To prevent new cookies from being installed and delete existing cookies: http://windows.microsoft.com/en-GB/internet-explorer/delete-manage-cookies Firefox To prevent new cookies from being installed: https://support.mozilla.org/en-US/kb/enable-and-disable-cookies-website-preferences To delete existing cookies: https://support.mozilla.org/en-US/kb/delete-cookies-remove-info-websites-stored