I am a beginner in developing Chrome Extensions. I am currently working on an extension. Consider an extension, which only works on Instagram pages (.com, .in, ... and so on). Now there are two conditions:

1. If it is an Instagram page, the popup.html says 'YES' and change some contents of DOM.
2. If it is not an Instagram page, the popup.html says 'NO' and there is no change in DOM.

    {
        "name": "Extension",
        "description": "Description goes here",
        "version": "1.0",
        "manifest_version": 3,
        "permissions": ["tabs"],
        "content-scripts": { // DO SOMETHING HERE
        }
    }

I am using Manifest Version 3. Can I know the way I can check if the domain of the active tab is instagram, and if it is so, then where/how should I mention the source of the js file to be executed.