Examine source code of Ratevert Exchange Rates for Currency & Crypto

{
  "manifest_version": 3,
  "name": "Ratevert Exchange Rates for Currency & Crypto",
  "description": "Select prices on any webpage to convert currency and crypto with live exchange rates, auto-detection, and optional tax or fee.",
  "version": "0.1.2",
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://ratevert.com/*"
  ],
  "action": {
    "default_title": "Ratevert Converter",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "service-worker.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "css": [
        "content-style.css"
      ],
      "js": [
        "content-script.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "resources": [
        "icons/icon32.png"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      },
      "id": "extension@ratevert.com",
      "strict_min_version": "140.0"
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}