Examine source code of CSP Evaluator

{
  "action": {
    "default_icon": "resources/icon-grey.png",
    "default_popup": "app.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "js": [
        "contentscript.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "world": "ISOLATED"
    }
  ],
  "description": "CSP Evaluator is a tool that allows developers to check if a Content Security Policy (CSP) serves as mitigation against XSS attacks.",
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "resources/icon16.png",
    "48": "resources/icon48.png",
    "128": "resources/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d01103f3-7c8d-4533-bd92-317ba9a1cae6}"
    }
  },
  "manifest_version": 3,
  "minimum_chrome_version": "88",
  "name": "CSP Evaluator",
  "permissions": [
    "storage",
    "webRequest"
  ],
  "short_name": "CSP Evaluator",
  "version": "0.3.3",
  "web_accessible_resources": []
}