Examine source code of youtube music

{
  "manifest_version": 3,
  "name": "youtube music",
  "version": "1.0.1",
  "description": "discord status for youtube music",
  "icons": {},
  "browser_specific_settings": {
    "gecko": {
      "id": "winterstorm.dev@gmail.com",
      "strict_min_version": "58.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://music.youtube.com/*"
      ],
      "js": [
        "scripts/content-script.js"
      ]
    }
  ]
}