I'm following this video and have also enabled json formatter extension. But can anyone help me understand why the below error is produced:

this is the manifest.json file

{
  "manifest_version": 2,
  "name": "My Cool Extension",
  "version": "0.001",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": ["content.js"]
    }
  ]
}

this is the content.js file

console.log("My First Attempt");