Examine source code of Simple Random Generator

{
  "manifest_version": 2,
  "name": "Simple Random Generator",
  "version": "1.0",
  "description": "Quick and simple random number generator.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Randomizer",
    "default_popup": "popup.html"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ec488092-3256-4b8d-b623-a01159015452}",
      "strict_min_version": "94.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}