[firepacket]

You mean a super cookie?

Not only would this violate tracking laws in some areas, but who would ever want to use such a thing?

[tacostakohashi]

No. Generated at the time the browser executable is built (by the vendor, linux distro, etc), and hence shared by all the people using that browser executable. So, only good for identifying the browser, platform, OS and features, and much less so the users.