Block third party cookies

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Many browsers allow you to block third-party websites from setting cookies. These are generally made by web bugs or ads and used by analytics and advertising companies.

Third party cookies can track your browsing activities across the web; some networks, like Google AdSense are quite large and span many thousands of websites!

However, please note that advertisers and trackers have many tricks to get around this method, like loading cookies from iframes.

Contents

[edit] Mozilla Firefox 1.0.7

  1. Go to Tools--->Options
  2. Click on the Privacy section.
  3. Click on the + next to "Cookies."
  4. Check the 'for the originating web site only' box.

[edit] Mozilla Firefox 1.5.x

  1. Go to Tools--->Options
  2. Click on the Privacy section.
  3. Click on the Cookies tab.
  4. Check the 'for the originating site only' box.

[edit] Mozilla Firefox 2.x

The option to restrict cookie permissions to originating sites only has been taken away from the Options panel. However, you can get it back by following the instructions at http://www.mozillazine.org/misc/about:config/ and changing network.cookie.cookieBehavior to 1.

Otherwise, you can choose to disable all cookies by default and only allow trusted sites to set cookies by using the CookieSafe extension.

[edit] Safari 2.0

  1. Go to the Security option on the Preferences panel.
  2. In the "Accept Cookies" section, select "Only from sites you navigate to"
  3. To clear away all existing cookies, click on the "Show Cookies" button in the Security section of Preferences. There is a "Remove All" button there.
  4. You can also use the "Show Cookies" button to select individual cookies and click "Remove" to delete them.

[edit] Opera 9.x

  1. Go to the Advanced tab on the Preferences panel.
  2. Go to the Cookies section.
  3. Select "Accept cookies only from sites I visit"
  4. You can also click on the "Manage cookies..." button to delete or manage cookie settings for individual sites.

[edit] Internet Explorer 7

  1. Go to Tools--->Internet Options
  2. Click on the Privacy tab.
  3. Click on the Advanced button.
  4. Check the 'Override automatic cookie handling' box. Under Third-party Cookies, select 'Block'.
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