The question is not what the browser is doing (which is easily verifiable with a network proxy, even without the browser being open source), but the question is

The question is not what the browser is doing (which is easily verifiable with a network proxy, even without the browser being open source), but the question is what the server is doing with the data that is being sent to it by the browser, and that data includes PII like the IP address. The best way to remove this question is for browsers to be zero-telemetry which is what I was advocating for.