JS console error displaying my API Key on failed login - Chrome only

[Steven Aiello]

Version info

**Angular:

https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js
https://code.angularjs.org/1.6.9/angular-route.min.js

Firebase:

https://www.gstatic.com/firebasejs/3.6.6/firebase.js

AngularFire:

https://cdn.firebase.com/libs/angularfire/2.3.0/angularfire.min.js

Other (e.g. Node, browser, operating system) (if applicable):

Test case

From this code base:
https://github.com/nasquam/angular-firebase/tree/69f6576ab5cad0ee1aeb641820d26dd5994c4fc5
Image of the error:
https://angular-firebase-92878.firebaseapp.com/assets/img/post_error.PNG

Steps to reproduce

Attempt a login with a bad username and password in the google Chrome browser

Expected behavior

Not to have my API key exposed in the JS console....

Actual behavior

There's a warning message printing in the JS console that has my API key in it.