Examine source code of NordVPN - a VPN proxy extension for Firefox

{
  "manifest_version": 3,
  "short_name": "NordVPN",
  "version": "5.6.5",
  "host_permissions": [
    "<all_urls>"
  ],
  "incognito": "spanning",
  "icons": {
    "16": "icons/nordvpn-16-active.png",
    "32": "icons/nordvpn-32-active.png",
    "48": "icons/nordvpn-48-active.png",
    "128": "icons/nordvpn-128-active.png"
  },
  "action": {
    "default_icon": "icons/nordvpn-48-active.png",
    "default_popup": "index.html",
    "default_title": "NordVPN"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "*.css",
        "/icons/*",
        "/fonts/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "fonts.bundle.css"
      ]
    },
    {
      "run_at": "document_start",
      "matches": [
        "https://youtube.com/*",
        "https://www.youtube.com/*"
      ],
      "js": [
        "csProxyDetectionYoutube.bundle.js"
      ],
      "all_frames": false,
      "world": "ISOLATED"
    },
    {
      "run_at": "document_start",
      "matches": [
        "https://tv.youtube.com/*"
      ],
      "js": [
        "csProxyDetectionTvYoutube.bundle.js"
      ],
      "all_frames": false,
      "world": "ISOLATED"
    }
  ],
  "name": "NordVPN - a VPN proxy extension for Firefox",
  "description": "One click, and you're connected to the fastest VPN out there — NordVPN. Stay safe online with our VPN proxy extension for Firefox.",
  "browser_specific_settings": {
    "gecko": {
      "id": "nordvpnproxy@nordvpn.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "locationInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "permissions": [
    "alarms",
    "scripting",
    "proxy",
    "webRequest",
    "webNavigation",
    "privacy",
    "storage",
    "notifications",
    "tabs",
    "contextMenus",
    "activeTab",
    "unlimitedStorage",
    "downloads",
    "declarativeNetRequestWithHostAccess",
    "webRequestBlocking",
    "dns"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}