Examine source code of Price Watch dk

{
  "manifest_version" : 3 ,
  "name" : "Price Watch",
  "version" : "1.2.0",
  "description" : "Track product prices locally and get notified when they drop.",
  "icons" : {
    "48" : "icons/icon.svg",
    "96" : "icons/icon.svg"
  },
  "permissions" : [
    "activeTab" ,
    "alarms" ,
    "notifications" ,
    "storage" ,
    "scripting" 
  ],
  "optional_host_permissions" : [
    "*://*/*" 
  ],
  "background" : {
    "scripts" : [
      "price-parser.js" ,
      "background-v2.js" 
    ]
  },
  "action" : {
    "default_title" : "Price Watch",
    "default_icon" : "icons/icon.svg",
    "default_popup" : "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "price-watch@example.org",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "140.0"
    }
  }
}