Examine source code of IP Emojifier

{
  "name": "IP Emojifier",
  "version": "1.0.4",
  "description": "Encodes IP addresses as emoji, and parses them back to ip.",
  "permissions": [
    "storage",
    "https://*/*",
    "http://*/*",
    "tabs"
  ],
  "browser_action": {
    "default_title": "IP Emojifier",
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "ip-emojifier@6connect.com",
      "strict_min_version": "42.0"
    }
  }
}