Internet Explorerhttp://windows.microsoft.com/en-gb/windows7/block-enable-or-allow-cookies
Chromehttps://support.google.com/chrome/answer/95647?hl=en-GB
Firefoxhttps://support.mozilla.org/en-US/kb/enable-and-disable-cookies-website-preferences
Safarihttps://support.apple.com/en-gb/HT201265