Examine source code of Quick Calculator Easy

{
  "manifest_version": 2,
  "name": "Quick Calculator",
  "version": "1.0",
  "description": "A simple calculator for quick calculations with sequential operations.",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png"
    },
    "default_popup": "popup.html",
    "default_title": "Quick Calculator"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "quick-calculator@tudominio.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": []
}