[codezero]

Is there a website you can visit that will tell you if your TLS handshake doesn't match your browser's user agent?

Maybe this will have to wait until after the team from this paper releases their fingerprints: https://github.com/zakird/tlsfingerprints

[cesarb]

https://www.ssllabs.com/ssltest/viewMyClient.html tells you what your client handshake looks like, and https://www.ssllabs.com/ssltest/clients.html shows the usual handshake for several popular browsers.