Can't create ember record from console

I've just started learning ember.js (v2.0.0), I was following this page, and at one point, the tutorial instructs me to create 4 records from the chrome console. I do exactly as instructed, but nothing happens. No errors, warnings, nothing.

If things went as expected, I should have had 4 records synced to my firebase server, but that's not what happened.

I have the Ember Inspector from Chrome Web Store installed. Basically, I've followed the instructions exactly as described in the tutorial.

Hours of googling didn't help.

Any help is appreciated. Thanks.