Examine source code of Kreel

{
  "manifest_version" : 3 ,
  "name" : "Kreel",
  "version" : "1.0.2",
  "description" : "Detect and collect RSS/Atom feeds as you browse, then export to Excel or OPML. 100% local, no tracking.",
  "homepage_url" : "https://safeandinformed.com/kreel",
  "permissions" : [
    "storage" ,
    "scripting" ,
    "tabs" ,
    "activeTab" ,
    "downloads" 
  ],
  "optional_permissions" : [
    "<all_urls>" 
  ],
  "background" : {
    "scripts" : [
      "lib/browser.js" ,
      "lib/normalize.js" ,
      "lib/validate.js" ,
      "lib/detect.js" ,
      "lib/blocklist.js" ,
      "lib/basket.js" ,
      "lib/session.js" ,
      "background/background.js" 
    ]
  },
  "action" : {
    "default_title" : "Kreel — feed capture",
    "default_popup" : "popup/popup.html",
    "default_icon" : {
      "16" : "assets/icons/icon-16.png",
      "32" : "assets/icons/icon-32.png",
      "48" : "assets/icons/icon-48.png",
      "96" : "assets/icons/icon-96.png",
      "128" : "assets/icons/icon-128.png"
    }
  },
  "icons" : {
    "16" : "assets/icons/icon-16.png",
    "32" : "assets/icons/icon-32.png",
    "48" : "assets/icons/icon-48.png",
    "96" : "assets/icons/icon-96.png",
    "128" : "assets/icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kreel@safeandinformed.com",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}