Check my public and private IP addresses

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Check my public and private IP addresses",
  "short_name": "Check my IPs",
  "description": "Check out the personal and public IP addresses of the client",
  "version": "1.2.0",
  "browser_action": {
    "default_icon": "img/Check-my-IPs-128.png",
    "default_popup": "popup.html",
    "default_title": "Check out my IP addresses"
  },
  "author": "Marin Marinov",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*"
  ]
}