“So what are the odds that we BOTH have such unique settings?”
Quite large. I identified 23 relevant elements on ‘User Agent’ and ‘HTTP_ACCEPT Headers’ alone. If each of them were binary (has only two choices) there would be 2^23 different possible configurations, or 8,388,608, which is much more than the 1.56 million in the database. They’re not binary, there’s a lot more configurations than that. And that’s without taking the other five parameters. Collision chances don’t seem too high.
“I identified 23 relevant elements on ‘User Agent’ and ‘HTTP_ACCEPT Headers’ alone”
How many of these would you have to change to make your browser look different?
And if you changed them every so often you can’t be consistently identified.
I’m not enough of a conspiracy theorist to believe we are being tracked right now because the amount of info that would have to be stored is so vast it staggers the mind, but it is an interesting issue going forward.