This free extension allows you to block internal traffic from triggering a connection to Google Tag Manager.

The Google Tag Manager is a web service to manage tags, events, and custom variables in your Google Analytics, AdWords, or other Google platforms.

With this tool you can block all requests that are not coming from the webpage you're serving, and it will not affect the functionality of your website.

There are two options to use the extension:

You can block the whole application (the logic is enabled by default) or you can block specific pages, select a page and configure the logic for that page.