Firebase talking to unbounce

firebasedb.html

<script src="https://www.gstatic.com/firebasejs/7.1.0/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/5.0.3/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/5.0.3/firebase-auth.js"></script>
<script src="https://code.jquery.com/jquery-1.12.4.js" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js" crossorigin="anonymous"></script>  

<script>
        debugger;  
    $(document).ready(function() {
        debugger;       
        
        var config = {
            apiKey: "",
            authDomain: "",
            databaseURL: "",
            projectId: "",
            storageBucket: "",
            messagingSenderId: "",
            appId: ""
        };
    
        firebase.initializeApp(config);

        firebase.auth().signInAnonymously().catch(function(error) {
        
            var errorCode = error.code;
            var errorMessage = error.message;
            console.log(errorCode + ":" + errorMessage);
        });
    
        firebase.auth().onAuthStateChanged(function(user) {
            if (user) {           
                const db = firebase.firestore();
                db.settings({ timestampsInSnapshots: true }); 

                var unis = [];
                db.collection("universities").get().then((querySnapshot) => {
                    querySnapshot.forEach((doc) => {                    
                        unis.push(doc.data().name);      	
                    });

                    var $uni_name = $("#university");
                    $uni_name.autocomplete({
                        source: unis
                    });

                    if(document.forms.length > 0) {                
                        document.forms[0].addEventListener('submit', function() {

                            db.collection("universities").add({
                                name: $uni_name.val()
                            });
                        });
                    }
                });

                var groups = [];
                db.collection("groups").get().then((querySnapshot) => {
                    querySnapshot.forEach((doc) => {                    
                            groups.push(doc.data().name);      	
                    });

                    var $society_name = $("#society_name");
                    $society_name.autocomplete({
                        source: groups
                    });

                    if(document.forms.length > 0) {                
                        document.forms[0].addEventListener('submit', function() {

                            db.collection("groups").add({
                                name: $society_name.val()
                            });
                        });
                    }

                });                        
            }
    });
});

</script>