Changes

HTTP/2 draft support is included in routine builds of firefox, but is disabled by default. <b>To get the most up to date support you should use the nightly channel</b>.

There is a separate, more experimental, build available that supports HTTP/2 draft-12 for http:// URIs using Alternate-Services (-01) and the "h2-12" profile. Sometimes this is known as opportunistic encryption. This allows HTTP/2 over TLS for http:// URIs in some cases without verification of the SSL certificate. It also allows spdy/3 and spdy/3.1 for http:// URIs using the same mechanism.

That code is at https://hg.mozilla.org/try/rev/b569a3723cbb 3d48401236e4 and https://github.com/mcmanus/gecko-dev/tree/oe08 oe10 with downloads at https://ftp-ssl.mozilla.org/pub/mozilla.org/firefox/try-builds/mcmanus@ducksong.com-b569a3723cbb3d48401236e4