http/headers/Idempotency-Key.json

{
  "http": {
    "headers": {
      "Idempotency-Key": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/HTTP/Reference/Headers/Idempotency-Key",
          "spec_url": "https://datatracker.ietf.org/doc/html/draft-ietf-httpapi-idempotency-key-header/#name-the-idempotency-key-http-re",
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "135",
              "flags": [
                {
                  "type": "preference",
                  "name": "network.http.idempotencyKey.enabled",
                  "value_to_set": "true"
                }
              ],
              "impl_url": "https://bugzil.la/1830022",
              "notes": "Automatically adds a unique 64-bit key for POST requests when needed, if not set in JavaScript."
            },
            "firefox_android": "mirror",
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": false
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}