Using Google’s products and services has always been fundamentally precarious—doing so gives the world’s largest advertising company a lot of juicy personal data. Google has long said it won’t use the sensitive data from products like Gmail, Drive, and Photos for ad personalization, but a change to the company’s privacy policy appears to dismantle that firewall.

On October 16, Google issued an update to its privacy policy , spotted by Android Authority . The ad personalization section used to include a clear limit on data from certain apps. “We don’t show you personalized ads based on your content from Drive, Gmail, or Photos,” the document said.…