Examine source code of QR & Bar Code Generator

{
  "manifest_version": 3,
  "name": "QR & Bar code generator",
  "version": "3.1.0",
  "description": "Browser extension for QR & Bar Code generation",
  "action": {
    "default_popup": "index.html"
  },
  "icons": {
    "16": "logo.png",
    "48": "logo.png",
    "128": "logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{676fad1b-6b8d-487e-93f2-132dc13860d7}"
    }
  }
}