Examine source code of Parallel Download Manager

{
  "manifest_version": 3,
  "name": "Parallel Download Manager",
  "version": "1.0.3",
  "description": "Gestiona y redirige descargas para Parallel Download Manager.",
  "permissions": [
    "tabs",
    "cookies",
    "contextMenus",
    "downloads",
    "management",
    "storage",
    "proxy",
    "scripting",
    "nativeMessaging"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*",
    "http://localhost:5000/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": {
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "Parallel Download Manager"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "parallel-download-manager@example.com",
      "strict_min_version": "91.1.0"
    }
  }
}