bitwarden-browser/config/development.json

{
    "urls": {
        "notifications": "http://localhost:61840"
    },
    "dev": {
        "proxyApi": "http://localhost:4000",
        "proxyIdentity": "http://localhost:33656",
        "proxyEvents": "http://localhost:46273",
        "proxyNotifications": "http://localhost:61840"
    }
}