Advertising Cookie Opt-out Plugin

Opting out permanently: Browser Instructions

See instructions for: IE and Firefox | Chrome | Safari | Other browsers

Internet Explorer and Mozilla Firefox

You can download the plugin for Internet Explorer and for Firefox from the homepage of the Google advertising opt-out plugin.

Instructions for Chrome

Google Chrome does not yet support plugins, but when it does, we will provide a Chrome version of the Google advertising cookie opt-out plugin. In the meantime, you can use Chrome's own built-in features to effectively opt out of the DoubleClick cookie permanently:

1. From Chrome, click on the "Customize and Control Google Chrome" icon, and in the drop-down menu, select "Options"
2. Select the "Under the Hood" tab
3. Under "Cookie settings" select "Restrict how third-party cookies can be used"

This option will prevent all third-party cookies, including the DoubleClick cookie and other advertising cookies, from being sent back to their corresponding third-party websites. As a consequence, the DoubleClick cookie is never sent to Google, which effectively is the same as setting the opt-out cookie.

See the Chrome documentation for more details about Chrome's different cookie settings.

Instructions for Safari

While we don't yet have a Safari version of the Google advertising cookie opt-out plugin, Safari is set by default to block all third-party cookies. If you have not changed those settings, this option effectively accomplishes the same thing as setting the opt-out cookie. To confirm that Safari is set up to block third-party cookies, do the following:

1. From Safari, select "Safari" in the menu bar, and then select "Preferences"
2. In the Preferences Dialog Box, select the "Security" tab
3. Make sure the "Accept cookies:" setting is set to "Only from sites you navigate to". You can also set this option to "Never", but this will prevent many web sites that rely on cookies from working.

Instructions for other browsers

Unfortunately, the plugin is not available for other browsers. You can always opt out using the Ads Preferences Manager, but without a special browser plugin, your opt-out setting will go away when you delete your browser's cookies (you would need to set it again manually).

If you're using another browser that's not mentioned above, you can look for a common feature, which accomplishes the same as setting the DoubleClick opt-out cookie: Find a setting in your browser's settings that allows you to only accept cookies from sites you visit, or only "first-party cookies". This option may also be described as "blocking third-party cookies."