If you have more than one copy of React DevTools installed and enabled (e.g. the version in the Chrome store and a locally built version) they can interfere with each other.

DevTools should detect this case and warn by showing a dialog in the DevTools UI and/or by logging to the console.

Note that we _should not warn_ if a related tool like Fast Refresh is present, only another copy of DevTools.
`console.error("${UNRECOGNIZED_EXTENSION_WARNING}")`,
      );
      callback(false);
      break;
    }
    case 'unknown': {
      
      
      
      
      console.error(UNRECOGNIZED_EXTENSION_WARNING);
      chrome.devtools.inspectedWindow.eval(
        `console.error("${UNRECOGNIZED_EXTENSION_WARNING}")`,
      );
      callback(false);
      break;
    }
    default: {
      (EXTENSION_INSTALLATION_TYPE: empty);
    }
  }
}
function checkForInstalledExtensions(
  extensionIds: string[],
): Promise<boolean[]> {
  return Promise.all(
    extensionIds.map(extensionId => checkForInstalledExtension(extensionId)),
  );
}
function checkForInstalledExtension(extensionId: string): Promise<boolean> {