Examine source code of Enter VPN

{
  "manifest_version": 2,
  "name": "Enter VPN",
  "version": "1.1.2",
  "description": "Boost your online privacy and access global content with this easy-to-use proxy extension. Safe, secure, and unrestricted browsing!",
  "incognito": "spanning",
  "permissions": [
    "storage",
    "proxy",
    "activeTab",
    "<all_urls>",
    "management",
    "privacy",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "notifications"
  ],
  "optional_permissions": [
    "webRequest",
    "privacy"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "assets/lock-icon-16.png",
      "48": "assets/lock-icon-48.png",
      "128": "assets/lock-icon.png"
    }
  },
  "icons": {
    "16": "assets/lock-icon-16.png",
    "48": "assets/lock-icon-48.png",
    "128": "assets/lock-icon.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "applications": {
    "gecko": {
      "id": "enter@vpn.com",
      "strict_min_version": "91.1.0"
    }
  }
}