But in the updated complaint, the states apply this argument to Google’s “Privacy Sandbox” — a tool that’s supposed to replace invasive third-party tracking cookies with a more limited system devised by Google.

“Google’s new scheme is, in essence, to wall off the entire portion of the internet that consumers access through Google’s Chrome browser,” the complaint reads. Blocking cookies might broadly be a good thing — other browsers like Firefox and Safari have already done it. But Chrome dominates the browser market, and it’s part of a much larger Google product suite. The suit argues that Google’s plans would require advertisers to use it as a middleman and would make Google’s own advertising system far more attractive.