https://groups.google.com/forum/?fromgroups=#!searchin/mozilla.dev.identity/stateless/mozilla.dev.identity/P4kIQFKNzyE/EuNG5NMYl-cJ please read my and Ben's comments.

https://github.com/mozilla/browserid-bigtent/issues/178 discusses various aspects of the cookie, devices.

There are known limitations, but this is a production bugfix until we get a persistent backend. Thus the **stateless** part of the proposal/pull request.