The HTTP/2 protocol is a major revision of the HTTP network protocol, providing improved performance and efficiency by using a single TCP connection to send multiple streams of data at once.

Compatibility (view on caniuse.com)

• Chrome 41 Released on 2015-03-03
• Chrome Android 41 Released on 2015-03-11
• Edge 12 Released on 2015-07-29
• Firefox 36 Released on 2015-02-24
• Firefox for Android 36 Released on 2015-02-27
• Safari 9 Released on 2015-09-30
• Safari on iOS 9 Released on 2015-09-16