Can't load fonts from firebase app

I cannot request google fonts from a firebase url, for example `https://myapp-dev.web.app/`. It results in a 403.

Specifically, if I send a request to google fonts that includes the header:

`Referer: https://myapp-dev.web.app/` I receive a 403 response when it should be a 200 with the fonts.

You can see my stackoverflow question for more details:

https://stackoverflow.com/questions/56762048/google-fonts-403-from-firebase-hosted-app