I’m constantly looking for an easier way to insert custom code into sites. I wanted to create a simple tool to make that task easier for me.

The extension was born as an app with the name Sites Custom Codes - Inject JS and CSS.

The first thing that you need to do is to open it and get started. It’s very easy and intuitive.

The first time you open it, it will create an account in your browser. You just need to enter the username, password, and password recovery code.