Examine source code of Wallpaper HERO

{
  "manifest_version": 3,
  "name": "Wallpaper HERO",
  "version": "3.1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "commands": {
    "toggle-wallpaper": {
      "suggested_key": {
        "default": "Ctrl+Shift+W"
      },
      "description": "Duvar kağıdını aç/kapat"
    }
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "p864686@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}