The latest (tip-of-tree) protocol changes frequently and may break at any time. However it captures the full capabilities of the Protocol, whereas the stable release is a subset. There is no backwards compatibility support guaranteed for the capabilities it introduces.
Latest browser_protocol.json version updated:
Date: 2017-12-07 19:16:02 -0800
Latest js_protocol.json version updated:
Date: 2017-12-08 05:15:43 -0800