Examine source code of Defichain Captain

{
  "name": "Defichain Captain",
  "version": "1.12.4",
  "description": "Viewer for DeFichain, showing rewards from liquidity pools, staking, price and much more. Keep track of your DeFi.",
  "manifest_version": 3,
  "action": {
    "default_popup": "index.html",
    "default_icon": "assets/icon.png"
  },
  "icons": {
    "16": "assets/icon.png",
    "32": "assets/icon.png",
    "48": "assets/icon.png",
    "128": "assets/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ecea659b-dcd9-4c5e-b723-eb05edd68b72}"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://ocean.defichain.com/*",
    "https://api.cakedefi.com/coins/apy",
    "https://open.er-api.com/*",
    "https://api.dfx.swiss/*"
  ]
}