For users of the blockerDNS extension for Google Chrome, Microsoft Edge or Firefox, the only information we have is that which is provided to us by the respective add-on/extension store (i.e., number of extension downloads, etc.). We collect absolutely no information while the extension is being used. All of the filtering/ad blocking is done locally by the extension. That is to say, the extension does not "phone home" with your data or send any requests back to us. We don't even collect the kind of legitimate information lots of other developers do that lets them see how you use their product so they can figure out where things need improving.

That said, the extension does occasionally talk to the blockerDNS servers for one sole purpose, though, and that is to check if there is an updated version of the ad and tracker block list. When the extension is first installed it comes with a built-in list, and we originally planned on putting out a new version of the extension through the Chrome, Edge and FIrefox web stores with a fresh built-in list each time we updated it. But all store review processes for new extension versions take a few days. And since we prefer users to have the latest block lists as soon as possible, we added the ability for the extension to check for updated lists. The request it makes to our server does not include any user information whatsoever. No authentication, no id number, nothing.