You may block or limit the reception of cookies by changing the options of your browser.
In Internet Explorer, click on the “Tools” item in the Menu Bar and then on the sub-item “Internet Options”. Finally, access the settings on the “Privacy” tab to change your cookie preferences.
In Firefox, click on the “Tools” item in the Menu Bar and then on the “Options” sub-item. Finally, access the “Privacy” settings to change your cookie preferences.
In Chrome, type “chrome: // settings / content” in the address bar (without quotes) and change the cookie settings as desired.
In Safari, select “Preferences” and then select “Privacy”. In the “Block Cookie” section you can specify how Safari should deal with cookies from websites.
If you use Safari on mobile devices, such as iPhone and iPad go to the “Settings” item of the device and then tap “Safari” in the left menu. From here, under the heading “Privacy and security” you can manage the options on cookies.
To disable cookies from external services please follow the relevan instructions: