Alright, so after you've got your Firebase project up and running, it's time to set up how users will log in. Whether it's through Email/Password, Google, Facebook, or another method, you can do this easily from the Firebase console. Just follow these steps:

• Head over to the Firebase console and find your project.
• Click on the "Authentication" section.
• Go to the "Sign-In Method" tab.
• Pick a Sign-In provider, toggle the switch to enable it, and hit "Save".

Next, you need to make sure Firebase is all set up in your app. Here's how you do it:

  import * as firebase from "firebase/app";
  import "firebase/auth";

  var firebaseConfig = {
    apiKey: "your-apiKey",
    authDomain: "your-authDomain",
    projectId: "your-projectId",
    
    //...
  };

  firebase.initializeApp(firebaseConfig);

Don't forget to swap out "your-apiKey", "your-authDomain", "your-projectId", etc., with the actual values from your Firebase project.

Before you can update any user profiles, you need to make sure the user is either created or authenticated. So, you'll need to sign up or sign in a user first.

Now, let's get to the fun part—updating the user's profile info like their display name and photo URL. Here's how you can do it with Firebase:

  var user = firebase.auth().currentUser;

  user.updateProfile({
    displayName: "New User Name",
    photoURL: "https://example.com/jane-q-user/profile.jpg"
  }).then(function() {
    // Update successful.
  }).catch(function(error) {
    // An error happened.
  });

Just make sure to replace "New User Name" and the photoURL with the new details you want to update.

Finally, you can check if the changes went through by accessing the user's profile in your app:

  var user = firebase.auth().currentUser;

  if (user != null) {
    user.providerData.forEach(function (profile) {
      console.log("Sign-in provider: " + profile.providerId);
      console.log("  Provider-specific UID: " + profile.uid);
      console.log("  Name: " + profile.displayName);
      console.log("  Email: " + profile.email);
      console.log("  Photo URL: " + profile.photoURL);
    });
  }

This will log the updated user details in the console. Feel free to replace the console.logs with whatever method you prefer for output.