Examine source code of TPscanner

{
  "manifest_version": 3,
  "name": "TPscanner",
  "description": "__MSG_extensionDescription__",
  "version": "1.0.2",
  "default_locale": "en",
  "icons": {
    "48": "images/icon.png"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://www.trovaprezzi.it/*",
    "https://trovaprezzi.it/*"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "service_worker": "js/background.js",
    "type": "module"
  },
  "action": {
    "default_icon": "images/icon.png",
    "default_popup": "html/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "TPscanner@fcalefato.dev"
    }
  }
}