Examine source code of RatioVPN

{
  "manifest_version": 3,
  "name": "RatioVPN",
  "version": "1.1.0",
  "description": "Open, privacy-first Firefox proxy tunnel controller with Android hardening, built-in ad/tracker blocking, split routing, conflict protection, session-only credentials, diagnostics, and guided setup.",
  "permissions": [
    "proxy",
    "storage",
    "privacy",
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "action": {
    "default_title": "RatioVPN",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "options_ui": {
    "page": "pages/settings.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ratiovpn@ratioworks.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'none'; base-uri 'none';"
  },
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ads_core",
        "enabled": true,
        "path": "rules/ads-core.json"
      },
      {
        "id": "trackers_core",
        "enabled": true,
        "path": "rules/trackers-core.json"
      }
    ]
  }
}