Examine source code of ParamScan

{
  "manifest_version": 3,
  "name": "ParamScan",
  "version": "1.0",
  "description": "Passively check for every reflecting parameter in the visiting page.",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ParamScan@ch1y0w0"
    }
  },
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "128": "logo.png"
  }
}