"Cross-Origin Request Blocked" interacting with firebase from localhost

Question

I'm following this tutorial as a way to get familiar with Vue.js, vuex, and Firebase.

I have set up a Firebase account and created a simple 'Signup' page per the linked blog post. I get the following error when trying send a create user request to Firebase.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://www.googleapis.com/blah/blah. (Reason: CORS header ‘Access-Control-Allow-Origin’ does not match ‘https://localhost:8080’).

The signup form triggers the following method:

  userSignUp () {
    if (this.comparePasswords !== true) {
      return
    }
    this.$store.dispatch('userSignUp', {
      email: this.email,
      password: this.password
    })
  }

Which in turn calls:

userSignUp ({ commit }, payload) {
  firebase.auth().createUserWithEmailAndPassword(payload.email, payload.password)

I am using npm run dev to host the files locally.

Do I need to add something to the request header from within Vue?