http://free.avg.com/us-en/faq.tpl-crp.num-4778
The supported web browsers for the AVG Do Not Track feature are Internet Explorer, Mozilla Firefox and Google Chrome. An eye icon
in your browser shows the websites and advertisers collecting data about your online activity and gives you the choice to allow or disallow, based on the type of the service. At the same time, the eye icon allows you to access the AVG Do Not Track settings.
By default, certain services are blocked by AVG Do Not Track. If you wish to modify the default settings of the feature, you can either block or allow individual services directly in the AVG Do Not Track interface, or manage settings for all services:
on your browser bar.AVG uses W3C DNT protocol to automatically notify sites that you don’t want to be tracked. This notification is enabled by default. You can change the settings as follows:
on your browser bar.
Note: If you cannot see the AVG Do Not Track icon
in your web browser, you can display it as described in the article FAQ 4911 - Displaying the hidden AVG Do Not Track button.