The help button of most web browsers explains you can set up your browser to block acceptance of new cookies, have your browser notify you when you receive a new cookie, or how you can switch off all received cookies. Similar functions, such as Flash Cookies, which are used by browser add-ons can be switched off or deleted by changing the settings of the browser add-on or via the website of the producer of the browser add-on.

In the following we explain you can adjust your settings in order to refuse or accept cookies in the five most commonly used browsers (Internet Explorer, Mozilla Firefox, Google Chrome, Opera, Apple Safari):

1. With Internet Explorer open, click on the 'Extras' button and then 'Internet options'.
2. Click on the 'Privacy' tab. The settings for accepting or rejecting cookies can be adjusted with the slider and the settings 'High, Medium, Low'. 
   • Accept all cookies: slide the slider down to accept all Cookies
   • Block all cookies: slide the slider up to block all cookies An exact indication of which cookies are blocked or allowed in each case is shown next to the slider.
   • Only block cookies from third parties: Click the 'Advanced' menu item in the 'Privacy' tab and select the field corresponding to 'Block third-party cookies'.
3. Then click 'OK' in order to confirm the Setting.

1. With the Firefox window open, click the 'Firefox' button (on the 'Extras' menu item in Windows XP) and then select the 'Settings' submenu.
2. Click on the 'Privacy' tab.
3. Click the 'Use custom settings for history' next to 'Firefox will' in the 'History' area.
• Accept all cookies: Check the box next to 'Accept cookies'
• Block all cookies: Remove the check mark next to 'Accept cookies'
• Only block cookies from third parties: Remove the check mark from 'Accept third-party cookies'.
4. You can also choose how long cookies can be saved in Firefox:Keep until: 'they expire': Each cookie is deleted when its validity date has expired. This value is defined by the website from which the cookie originates.
• Keep until 'Firefox is closed': Cookies which are stored on your computer are deleted when you close Firefox.
• Keep until 'ask me every time': A warning message is shown each time a website attempts to save a cookie. You can then allow or refuse the cookie.        
5. Confirm your setting with 'OK'.

1. Click on the wrench symbol in the symbol bar of the browser.
2. Select 'Settings'.
3. Click on 'Show advanced settings' at the end of the page.
4. Click on the 'Content settings' button in the 'Privacy' section.
5. You can adjust the desired settings for cookies in the 'Cookies' area:
• Accept all cookies: Choose the setting 'Allow local data to be set'.        
• Block all cookies: Choose the setting 'Block sites from setting any data
• Only block cookies from third parties: Under this menu item you can block cookies from third-parties independently of the selected setting by marking the box 'Block third-party cookies and site data
• Google Chrome also offers the following setting: 'Keep local data only until you quit your browser', which means all cookies are deleted after you close the browser.

1. In the open browser window, click on the 'Settings' button in the browser menu.
2. Click on the 'Advanced settings' button
3. Click on the 'Cookies' button
• Accept all cookies: Choose the 'Accept cookies' setting
• Block all cookies: Choose the 'Never accept cookies' setting
• Only block cookies from third parties: 'Only accept cookies from sites I visit', which means cookies from servers other than those of the site you have just visited are rejected.

1. Click on the 'Safari' button
2. In the open browser window, click on the 'Settings' button in the browser menu.
3. Click on the 'Privacy' button
• Accept all cookies: Choose the setting 'Always'
• Block all cookies: Choose the setting 'Never'
• Block cookies from third parties: Choose the setting 'Only from sites I visit', which means cookies are only accepted from sites which you have visited.