Dan recently began using Google Chrome, and when he tries to use some extensions, he gets a warning box that says it can access his data on all websites along with browsing activity. Leo says this is true of any browser anyway, and is probably a little overzealous. Leo says his browser and internet service provider knows everything he does. This means that if he installs an extension, it will also know everything. It's important to only get browser extensions from the browser's extension store. He should only get them from well known and credible companies.