What percentage of Internet users turned off?

Question

I do what requires me to transfer information from one domain to a subdomain. The subdomain will be in the iframe in the domain. I know that I can use cookies, sessions or a database. But I'm trying to save processing time, so I thought about using a referrer. I know that for some reason someone turned off the referrer, but for sure how many. If they do, it will not work for them.

Oh, and I can’t use the URL to pass information.

Answer 1

I would say 0.001% of all Internet users have heard of referrers. Even a small part of them will be ready to turn them off. Even fewer of them can.