There used to be an option in browsers (and some still have it) to signal explicit opt-out of tracking - so called Do Not Track. Most advertisers ignore it, because they can. Today I was deploying a more privacy focused web analytics and had the option to respect it, so I did. Than for 20 minutes I was running in circles not being able to figure out why the analytics detected my visit in Edge, but not the one in Chrome. Want to venture a guess? Yes, few years ago I enabled DNT in Chrome and completely forgot about it.

On a slightly different note - the Global Privacy Control - a spiritual successor to DNT - already has some legislation behind it (as part of CCPA), will see whether it will have some support in EU.