Examine source code of Crypto Tracker

{
  "name": "Crypto Tracker",
  "version": "1.1",
  "description": "Chrome Extension to Track Your Favourite Crypto Price and Market Cap.",
  "icons": {
    "128": "128.png"
  },
  "permissions": [
    "activeTab",
    "*://*.api.nomics.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "128.png"
  },
  "manifest_version": 2
}