Not sure if this is the right place to ask for this. But I'll give it a try: Many website owners and CDN providers want the web servers or proxy servers to be able to do load balancing. For example, when the server is overloaded, redirect the request to some other servers; or based on the client IP address, send the client to a server that can provide better performance. What they can use today is the 30X redirection. Which has many limitations: 1. breaks the cookie, if you 30x redirect to another hostname or IP address. 2. breaks https if you redirect to another IP address. We need another way of telling the client/browser to only change the IP address but keep everything else the same. I'm proposing a simple addition to the HTTP protocol: new status code, for example: 312 with 2 new headers: "x-redirect-ipv4" and "x-redirect-ipv6". When a server wants to redirect the client to a different IP for whatever reason, it just returns this status code with headers with the IPv4 or v6 addresses. When the client (Firefox in this case) receives this, it picks one of the returned IPs and makes exactly the same HTTP(S) request again to that IP.