Examine source code of Cosmos Enhanced

{
  "manifest_version": 3,
  "name": "Cosmos Enhanced",
  "description": "Enhance cosmos podcast page",
  "author": "LGiki",
  "homepage_url": "https://github.com/LGiki/cosmos-enhanced",
  "version": "1.0.0.8",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "downloads"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.xiaoyuzhoufm.com/episode/*",
        "*://www.xiaoyuzhoufm.com/podcast/*"
      ],
      "js": [
        "cosmos-enhanced.js"
      ],
      "css": [
        "cosmos-enhanced.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cosmos-enhanced@lgiki.net",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}