This took me an embarrassingly long time to figure out, I won’t attempt to explain myself. Thanks Varun Raj for require('firebase/firestore') .

So you have a Vue app you built with the vue-cli and now you want to add Firestore to it? Great, me too!

Assuming you already have an app added to Firebase, head over to your Database section and select TRY FIRESTORE BETA.

Select the default rules for now, we’re about to change them. If you don’t already use Firebase for auth(), check out this tutorial to get started.