Examine source code of Media Downloader Pro

{
  "manifest_version": 3,
  "name": "Media Downloader Pro",
  "version": "1.1.1",
  "description": "Download every video, audio, and image from any webpage including hidden ones",
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "downloads",
    "scripting",
    "storage",
    "tabs",
    "webNavigation",
    "webRequest"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "media-downloader-pro@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "injected.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}