Examine source code of IPvFoo

{
  "name" : "IPvFoo",
  "manifest_version" : 3 ,
  "version" : "2.34",
  "description" : "Display the server IP address, with a realtime summary of IPv4, IPv6, and HTTPS information across all page elements.",
  "homepage_url" : "https://github.com/pmarks-net/ipvfoo",
  "icons" : {
    "16" : "icon16.png",
    "128" : "icon128.png"
  },
  "background" : {
    "scripts" : [
      "iputil.js" ,
      "common.js" ,
      "background.js" 
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ipvfoo@pmarks.net",
      "strict_min_version": "115.0"
    },
    "gecko_android": {
      "strict_min_version": "120.0"
    }
  },
  "page_action" : {
    "default_icon" : {
      "16" : "icon16_transparent.png"
    }
  },
  "options_ui" : {
    "page": "options.html" ,
    "browser_style": false
  },
  "permissions" : [
    "contextMenus" ,
    "storage" ,
    "webNavigation" ,
    "webRequest" 
  ],
  "host_permissions" : [
    "<all_urls>" 
  ]
}