Examine source code of Free VPN

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "description": "__MSG_extDesc__",
  "short_name": "Free VPN - 1VPN",
  "author": "Free VPN - 1VPN",
  "homepage_url": "https://1vpn.org",
  "version": "3.6.16",
  "default_locale": "en",
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "permissions": [
    "activeTab",
    "proxy",
    "storage",
    "webRequest",
    "privacy",
    "alarms",
    "management",
    "scripting",
    "webNavigation",
    "webRequestBlocking",
    "clipboardRead",
    "clipboardWrite"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.bundle.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d02cc185-589d-442a-a237-561e318a672c}",
      "strict_min_version": "114.0"
    }
  }
}