Examine source code of CSR vs SSR Detector

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "version": "3.10.0",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "notifications"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/probe.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d14f5025-b75f-435c-8d8e-e6b4d0e65457}",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "websiteActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}