Examine source code of Ned - CVSS Calculator

{
  "manifest_version": 3,
  "name": "Ned - CVSS Calculator",
  "version": "1.5.0",
  "description": "Calculate CVSS 3.1 & 4.0 scores directly. Completely offline, with a built-in MITRE CWE database for fuzzy searching.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ned-cvss-calculator@br0wnboi",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}