Examine source code of Crypto - Price Ticker

{
  "manifest_version": 2,
  "name": "Crypto - Price Ticker",
  "author": "Sanjeet",
  "version": "1.0.2",
  "description": "Get latest crypto trading information of top 20 coins",
  "icons": {
    "16": "16.png",
    "48": "48.png",
    "128": "128.png"
  },
  "browser_action": {
    "default_icon": "16.png",
    "default_popup": "index.html",
    "default_title": "Crypto-PT"
  },
  "permissions": [
    "activeTab"
  ],
  "content_security_policy": "script-src 'self' 'sha256-WDhufSqZOEoWULzS4Nwz11MNyHzZClVYbQ2JSt1vfkw'; object-src 'self'"
}