(See http://www.chromium.org/blink#launch-process for an overview)
OWP launch-tracking version of issue #526713 .
NPN was the TLS extension used to negotiate SPDY (and, in transition, HTTP/2). During the standardization process, NPN was replaced with ALPN, published as RFC 7301 in July 2014. We intend to remove NPN at the same time as the SPDY removal.
Changes to API surface:
We'll no longer offer the NPN extension as part of TLS handshakes. Sites using NPN to negotiate SPDY or HTTP/2 will fall back to HTTP/1.1 at a loss in performance but not functionality.
Public standards discussion: https://tools.ietf.org/html/draft-agl-tls-nextprotoneg-04
Support in other browsers:
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