Examine source code of Crypto Pulse

{
  "manifest_version": 2,
  "name": "Crypto Pulse",
  "description": "Feel the market pulse: BTC, ETH and 46 more coins with 24-hour movement, powered by a free public price API.",
  "version": "1.3.0.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3eea67ea-b08a-498b-976b-4a44f4137c1c}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "64": "assets/icon-64.png",
    "96": "assets/icon-96.png",
    "128": "assets/icon-128.png"
  },
  "permissions": [
    "storage",
    "https://api.coingecko.com/*"
  ],
  "background": {
    "scripts": [
      "core/core.js",
      "core/background.js"
    ]
  },
  "browser_action": {
    "default_title": "Crypto Pulse",
    "default_popup": "core/popup.html",
    "default_icon": {
      "32": "assets/icon-32.png",
      "48": "assets/icon-48.png",
      "64": "assets/icon-64.png",
      "96": "assets/icon-96.png",
      "128": "assets/icon-128.png"
    }
  }
}