Examine source code of WhomyIP Lookup

{
  "manifest_version": 2,
  "name": "WhomyIP Lookup",
  "version": "1.0.2",
  "description": "Official IP lookup tool with geolocation, ASN, and network information from WhomyIP.com",
  "author": "WhomyIP",
  "homepage_url": "https://whomyip.com",
  "developer": {
    "name": "WhomyIP",
    "url": "https://whomyip.com"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "24": "icons/icon-24.png",
    "32": "icons/icon-32.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "clipboardWrite",
    "contextMenus",
    "webRequest",
    "https://whomyip.com/"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "24": "icons/icon-24.png",
      "32": "icons/icon-32.png",
      "64": "icons/icon-64.png"
    },
    "default_title": "WhomyIP Lookup",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true,
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "applications": {
    "gecko": {
      "id": "whomyip@whomyip.com",
      "strict_min_version": "78.0"
    }
  }
}