Unhandled Rejection (SecurityError): The operation is insecure. On a fresh create-react-app project

Question

I created a new project with create-react-app then ran npm start then this showed up. https://imgur.com/a/3By9NCr

Using FF 69.0.3

Answer 1

This problem seems to only happen in Firefox. Edge worked fine.

After creating the project, in index.js change:

serviceWorker.register();
//serviceWorker.unregister();

Still trying to figure whose fault this is, but this should get you going.