Examine source code of YTM Song Filter

{
  "manifest_version": 3,
  "name": "YTM Song Filter",
  "version": "1.0.4",
  "description": "Automatically skip YouTube Music tracks containing user-specified keywords.",
  "browser_specific_settings": {
    "gecko": {
      "id": "ytmsongfilter@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://music.youtube.com/*"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icons/ytmsfilterlogo48.png",
    "96": "icons/ytmsfilterlogo96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://music.youtube.com/*"
      ],
      "js": [
        "ytmsongfilter.js"
      ]
    }
  ]
}