Could you fingerprint the browser to determine how many users are using the Tor Browser? Obviously this will miss the people who just use a normal browser throu

Could you fingerprint the browser to determine how many users are using the Tor Browser? Obviously this will miss the people who just use a normal browser through Tor. Or ask onion.to to log how many requests they are forwarding to you. Although, this will miss any other proxying service that happens to be running.