Examine source code of Dev Crypto Helper

{
  "manifest_version": 3,
  "name": "Dev Crypto Helper",
  "version": "1.1",
  "description": "Ferramenta PRO para conversão e hashes.",
  "browser_specific_settings": {
    "gecko": {
      "id": "devcryptohelper@vielmond.net",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://api.gumroad.com/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}