Cryptocurrency Exchange Rate

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "version": "0.2.0",
  "name": "Cryptocurrency Exchange Rate",
  "description": "Real-time exchange rate for multiple cryptocurrencies such as Bitcoin (BTC), Litecoin (LTC), DogeCoin (DOGE) and Ethereum (ETH)",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "contextMenus"
  ],
  "host_permissions": [
    "https://api.cryptonator.com/"
  ],
  "background": {
    "service_worker": "worker.js"
  },
  "action": {
    "default_title": "Loading..."
  },
  "homepage_url": "https://add0n.com/exchange-rate.html",
  "options_ui": {
    "page": "data/options/index.html"
  },
  "commands": {
    "_execute_action": {
      "description": "Press the action button"
    }
  }
}