The extra HTTP headers will be sent with every request the page initiates. NOTE: All HTTP header names are lowercased. (HTTP headers are case-insensitive, so this shouldn’t impact your server code.) NOTE: page.setExtraHTTPHeaders does not guarantee the order of headers in the outgoing requests.
| headers | Record<string, string> | An object containing additional HTTP headers to be sent with every request. All header values must be strings. |