bug#31946: 27.0.50; The NSM should warn about more TLS problems

[Jimmy Yuen Ho Wong]

> I can't see that that web page mentions Diffie-Hellman at all?
>

Click on the individual browsers.

> And Firefox in Debian Stable certainly supports Diffie-Hellman.
>

Firefox on Debian is Firefox 52 ESR, it's 9 versions behind current.
Firefox 60 ESR is in the experimental section.

SSLLabs only reports that Firefox 59 / Win 7 has dropped support for
DHE_RSA in the UA capabilities page[1], but client test[2] still shows
it is supported, so does Chrome and Safari. I don't understand what's
going on there. Could that list in in client test be static? Or that
browsers still advertise their support for DHE_RSA when in fact they
don't? Might have to get on a server and log out the TLS handshake to
see what's actually going on...

[1]: https://www.ssllabs.com/ssltest/clients.html
[2]: https://www.ssllabs.com/ssltest/viewMyClient.html