Google Chrome https://support.google.com/chrome/answer/95647?hl=es
Internet Explorer http://windows.microsoft.com/es-ES/windows7/How-to-manage-cookies-in-Internet-Explorer-9
Safari http://support.apple.com/kb/PH5042
Google has developed an add Google Analytics to disable browsers that can be accessed at the following link: https://tools.google.com/dlpage/gaoptout
A website with lots of information about cookies is:
http://www.aboutcookies.org/default.aspx