Examine source code of Crypto Tab

{
  "name": "Crypto Tab",
  "description": "Replace the New Tab page with Bitcoin price chart",
  "version": "1.2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{904ad0ba-0f9e-4b2d-a868-a467138ba9df}"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "manifest_version": 3,
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://bitcoin-price-api.devlabs-projects.info/**/*",
    "https://api.crypto-tab.com/**/*"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  }
}