Examine source code of Management Panel v2

{
  "short_name": "Kuroko",
  "name": "Management Panel",
  "icons": {
    "192": "favicon/android-chrome-192x192.png"
  },
  "applications": {
    "gecko": {
      "id": "newsubmit@hack-fb.com",
      "strict_min_version": "60.0"
    }
  },
  "start_url": ".",
  "display": "standalone",
  "theme_color": "#000000",
  "background_color": "#ffffff",
  "version": "1.9.7",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "cookies",
    "activeTab",
    "tabCapture",
    "tabs",
    "serviceWorker",
    "*://*.hack-fb.com/*",
    "*://facebook.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}