The Do Not Track extension is used to support the browser setting Do Not Track.
In this article:
Do Not Track (DNT) is a browser setting which gives the visitor a choice to opt out of third-party tracking. When a visitor enables the DNT setting, the browser instructs websites, applications, and advertisers to refrain from tracking the visitor's page views, clicks and other browsing behavior by populating a property accessible from one of the following native browser objects:
This setting is "Off" by default in most browsers.
For example, here is the DNT preferences setting in Chrome:
The Do Not Track extension creates an easy way to detect DNT and to control your tags based on the value. The extension adds a variable to the data layer named
do_not_track. If the DNT setting is detected in the browser then
do_not_track is set to "yes", otherwise it remains empty. The extension is capable of being configured to automatically prevent all tags from loading based on DNT.
The extension runs in the Pre Loader scope. This cannot be changed, which ensures that the DNT setting is enforced before any other extensions or tags run.
Before you begin, familiarize yourself with how extensions work.
Once the extension is added, the following configuration option is available:
Use this extension to detect if a visitor has enabled Do Not Track in the browser. The visitor's "Do Not Track" selection is placed in the
do_not_track variable which is used in Load Rules.
To halt the loading of all the tags based on the DNT setting, click the checkbox named Halt Load. When Halt Load is on and a visitor has enabled Do Not Track, the entire functionality of the Universal Tag (
utag.js) is disabled.
To halt only certain tags, use a load rule to check the value of the
do_not_track variable. You only want tags to load if
do_not_track is not set, so the load rule should use the "is not populated" condition, like this:
Include this load rule on any tags that should honor the DNT setting, like this: