AVL Download Master logo AVL Download Master

Support & Setup Guide

AVL Download Master · Windows Desktop App & Browser Extension

1. Getting Started

  1. Download AVLDownloadMaster v1.0.0 (Windows x64) (or AVLDownloadMasterPE for WinPE), extract the archive, and launch AVLDownloadMaster.exe once.
  2. On launch, the desktop app automatically registers the Native Messaging host (com.pitvn.avldm) in the current Windows user registry (HKCU) — no administrator privileges required.
  3. Install the AVL Download Master extension in Chrome, Edge, Brave, Cốc Cốc, Opera, Vivaldi, or Firefox.
  4. Click the extension icon in your browser toolbar to verify that the status shows Connected to the app.

2. Troubleshooting

Extension says "App not found" or "Could not reach the app":

  • Open AVLDownloadMaster.exe once so it refreshes the native messaging host manifest path in %LocalAppData%\AVLDownloadMaster\native-host.
  • If you moved AVLDownloadMaster.exe to a different folder, launch it once from the new location and reopen the extension popup.

No media streams appear in the popup:

  • Start playing the video on the page for a few seconds so the browser receives media stream headers.
  • On Firefox, click Allow access to websites in the extension popup if host permissions have not been granted yet.

Browser downloads are not being captured:

  • Open the extension popup and make sure Capture browser downloads is toggled on.
  • Check Skip files smaller than (MB) — set it to 0 if you want to capture small files too.

3. Supported Browsers

  • Chromium-based: Google Chrome, Microsoft Edge, Brave, Vivaldi, Cốc Cốc, Opera.
  • Mozilla: Firefox Desktop 140+.

4. Contact Support

Need help or want to report a bug? Reach out anytime via email: