[Question] How to set custom headers and read cookie information to maintain login status in a browser sandbox

I noticed that BrowserSandbox does not provide tools for custom headers or reading cookies. How can these functionalities be implemented?

and I see BrowserSandbox has attribute "timeout"， what it means and how can I change "timeout"

class BrowserSandbox(GUIMixin, BaseSandbox):
def __init__( # pylint: disable=useless-parent-delegation
self,
sandbox_id: Optional[str] = None,
timeout: int = 3000,
base_url: Optional[str] = None,
bearer_token: Optional[str] = None,
sandbox_type: SandboxType = SandboxType.BROWSER,
):