On Thu, Feb 16, 2017 at 4:22 AM, Gervase Markham <g...@mozilla.org> wrote:
> Did things break when we disabled it?

A few things.  It lasted less than a day in Nightly before we got
multiple bug reports.

> Do we know why Chrome decided not to support it? Two NIST curves is enough?

That's my understanding.  P-521 isn't busted, it's just a little
inefficient and not enough stronger than P-384 (or X448) that it is
worth keeping around when faced with a working quantum computer.  That
and the fact that more options is more code to carry, more options to
signal, and so forth.  I think that's the reasoning.
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