Examine source code of Web Stack Detector

{
  "manifest_version": 3,
  "name": "Web Stack Detector",
  "version": "1.1.0",
  "description": "Detects the frontend framework, UI library and bundler a site was built with, and shows it as the toolbar icon.",
  "browser_specific_settings": {
    "gecko": {
      "id": "web-stack-detector@swwind",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/signatures/bundlers.js",
      "src/signatures/frameworks.js",
      "src/signatures/meta.js",
      "src/engine.js",
      "src/background.js"
    ]
  },
  "action": {
    "default_popup": "src/popup.html",
    "default_icon": {
      "16": "icons/unknown-16.png",
      "32": "icons/unknown-32.png",
      "48": "icons/unknown-48.png",
      "128": "icons/unknown-128.png"
    }
  },
  "icons": {
    "16": "icons/unknown-16.png",
    "32": "icons/unknown-32.png",
    "48": "icons/unknown-48.png",
    "128": "icons/unknown-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "src/content-main.js"
      ],
      "world": "MAIN",
      "run_at": "document_idle",
      "all_frames": false
    },
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "src/content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ]
}