Examine source code of Pulse VPN

{
  "manifest_version": 3,
  "name": "Pulse VPN",
  "version": "3.0.0",
  "description": "Быстрое и безопасное VPN-подключение в один клик",
  "permissions": [
    "proxy",
    "storage",
    "clipboardRead",
    "webRequest",
    "webRequestAuthProvider"
  ],
  "host_permissions": [
    "https://proxymania.su/*",
    "https://speed.cloudflare.com/*",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "lib/browser-api.js",
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Pulse VPN",
    "default_icon": {
      "16": "icons/icon-red-16.png",
      "32": "icons/icon-red-32.png",
      "48": "icons/icon-red-48.png"
    }
  },
  "icons": {
    "16": "icons/icon-red-16.png",
    "32": "icons/icon-red-32.png",
    "48": "icons/icon-red-48.png",
    "128": "icons/icon-red-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pulse-vpn@extension.local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}