{
    "informational-responses": [
        {
            "engines": [
                "blink",
                "gecko"
            ],
            "filename": "http/headers/Upgrade.json",
            "name": "Upgrade",
            "slug": "HTTP/Headers/Upgrade",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Upgrade",
            "summary": "The HTTP 1.1 (only) Upgrade header can be used to upgrade an already established client/server connection to a different protocol (over the same transport protocol). For example, it can be used by a client to upgrade a connection from HTTP 1.1 to HTTP 2.0, or an HTTP or HTTPS connection into a WebSocket.",
            "support": {
                "chrome": {
                    "version_added": true
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": true
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": null
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": null
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": {
                    "version_added": true
                }
            },
            "title": "Upgrade"
        }
    ]
}