How can I listen for messages from the extension popup in ALL (there could be many) active contents?

export const config: PlasmoCSConfig = {
    matches: ["<all_urls>"],
    world: "MAIN",
    run_at: "document_start"
}

const content = () => {
    const mailPort = usePort("mail")

    return <>
        {mailPort.data?.message}
    </>
}

export default content