Examine source code of CurrencySwap

{
  "manifest_version": 3,
  "name": "CurrencySwap",
  "version": "1.0.0",
  "description": "Automatically detects and converts currencies on any web page. Like a translation app, but for money.",
  "author": "RalpinMdDjango",
  "homepage_url": "https://github.com/RalpinMdDjango/currencyswap",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "https://api.exchangerate-api.com/*",
    "https://open.er-api.com/*"
  ],
  "action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "CurrencySwap",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "currencyswap@ralpinmddjango",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {}
  }
}