Examine source code of Spotify Ad Muter

{
  "manifest_version": 2,
  "name": "Spotify Ad Muter",
  "version": "1.0.0",
  "description": "Automatically mutes Spotify tab when ads are playing and unmutes when music resumes",
  "author": "Power to the people",
  "permissions": [
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://open.spotify.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "spotify-ad-muter@power-to-the-people",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}