I just checked myself and the identifying info for me was by a huge margin fonts & plugins. User Agent will become far less relevant if Epic gets more adoption

I just checked myself and the identifying info for me was by a huge margin fonts & plugins. User Agent will become far less relevant if Epic gets more adoption and keeps a lock-step updating pattern. Perhaps as use of web fonts becomes more common perhaps it will become more feasible to send just a static list that's the same for all Epic users[1]. I suspect there's a potential cache-enumeration issue that would help tag browsers there, but I'm not sure. As for plugins, that's a bit more difficult - I wouldn't mind an option to ask if I wanted to let a site enumerate plugins, but you start getting into header games & pointless reloads there if you're not careful. [1] I force my own fonts for everything, so no UX issues for me. No idea how much of an issue it is for other folks.