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

A lot of answers here do actually solve the issue but the simplest way I have found is to add npm package serve to your dependencies.

yarn add serve or npm i serve

and then replace your start script with the following:

"scripts": {
    "start": "serve -s build",
}

This is actually straight out of the create-react-app docs