Deprecate and remove TLS Next Protocol Negotiation

Category: Network / Connectivity
Type: New or changed feature
Status: Removed (Chrome 51)
Intent stage: None

Breaking change: No
Enterprise impact: None
Spec maturity: Incubation

Summary

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.

Standards & signals

Specification: https://tools.ietf.org/html/draft-agl-tls-nextprotoneg-04
Firefox: No signal
Safari: No signal
Web developers: No signals
Tracking bug: https://crbug.com/587472

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=deprecate-and-remove-tls-next-protocol-negotiation
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+Deprecate%20and%20remove%20TLS%20Next%20Protocol%20Negotiation
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=Deprecate%20and%20remove%20TLS%20Next%20Protocol%20Negotiation
Baseline status: https://webstatus.dev/?q=Deprecate%20and%20remove%20TLS%20Next%20Protocol%20Negotiation

View on chromestatus.com