Connect to the browser target

That target is different from all the others. Manually, the URL can be obtained from the Chrome output, you'll see something like the following in your terminal:

DevTools listening on ws://127.0.0.1:9222/devtools/browser/36ae5218-0f94-436c-a1a3-452a9b24a673

Programmatically instead, it can be obtained with the Version DevTools method, for example:

const {webSocketDebuggerUrl: target} = await CDP.Version();
const browserClient = await CDP({target});