For more informations read the Privacy information page.
HOW TO DISABLE COOKIES IN YOUR WEB BROWSER
Press the "Alt" key.
In the toolbar at the top of the browser, select "Tools" and then "Options."
Then select the "Privacy" tab.
Go to "Settings History," and then "Use custom settings". Uncheck "Accept cookies from sites" and save preferences.
Internet Explorer :
Open Internet Explorer.
Click on "Tools" and then "Internet Options."
Select the "Privacy" tab and move the slider to the privacy level you want to set (up to block all cookies or to the bottom to allow it all).
Then click on OK.
Google Chrome :
Open Google Chrome.
Click on the "Tools".
Select "Settings" and then "Advanced Settings".
Select "Content settings" under "Privacy".
From the "Cookie and site data" where you can search and delete specific cookies.
Type chrome: // settings / cookies in the address bar and hit enter.
And you go to the tab "Cookies and site data" where you can search and delete specific cookies.
Choose "Preferences" in the toolbar, then select the panel "Security" in the dialog box that follows.
In the "Accept Cookies" you can specify if and when Safari should save the cookies from websites. For more information click on the Help button (labeled with a question mark).
For more information about cookies that are stored on your computer, click "Show Cookies".