[numakerg]

Wouldn't that link the account to the device's hardware ID and by extension, all the other accounts you've made on that device?

[BillinghamJ]

No? The web's security model does not expose such identifiers. The best you can do is fingerprinting, which is actively and continuously defended against by browser makers

[bigiain]

> which is actively and continuously defended against by browser makers

... except the dominant one (at least for their own web properties), who just happen to be the adversary in this particular discussion.