Examine source code of Word Counter Plus

{
  "manifest_version" : 3 ,
  "name" : "Word Counter Plus",
  "version" : "1.1",
  "description" : "Word Counter Plus Firefox Extension",
  "permissions" : [
    "storage" ,
    "activeTab" ,
    "scripting" 
  ],
  "action" : {
    "default_popup" : "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "word-counter-plus@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}