Privacy Policy

Web VideoDownloader Chrome Extension

Last updated: March 2, 2026

Overview

Data Collection

This extension does not collect any personal information. Specifically:

• No user accounts or registration required
• No analytics or tracking scripts
• No cookies set by the extension
• No data transmitted to any external server
• No browsing history recorded or stored

How the Extension Works

The extension monitors network requests in your browser to detect media files (MP4, WEBM, FLV, MP3, HLS/M3U8, etc.). This detection is performed locally within your browser using the Chrome webRequest API.

• Network Monitoring: The extension observes HTTP response headers to identify media content types. This monitoring is read-only and does not modify, block, or redirect any requests.
• Media Detection: Detected media URLs, file names, and sizes are temporarily cached in your browser's local storage (chrome.storage.local) and are automatically cleaned up when tabs are closed.
• Downloads: When you choose to download a file, the download is processed entirely in your browser. For HLS streams, segments are fetched and merged locally.

Local Storage

The extension uses Chrome's built-in storage APIs:

• chrome.storage.sync: Stores your preferences (size filter, blocked domains, language). Synced across your Chrome instances via your Google account.
• chrome.storage.local: Temporarily stores detected media information per tab. Cleared when tabs are closed or the browser is restarted.

Permissions

The extension requires the following permissions:

• tabs: To identify which tab media files are associated with and to read page titles for download filenames.
• webRequest: To monitor network responses and detect media files. This is observation-only; no requests are modified or blocked.
• storage: To save your preferences and temporarily cache detected media information.
• offscreen: To create blob URLs for media processing in the background.
• Host permissions (all URLs): Required to detect media files on any website you visit. The extension only reads response headers for media detection purposes.

Third-Party Services

The extension uses an external download page hosted on Vercel for downloading non-HLS media files. This page is a static HTML/CSS/JS site that processes downloads entirely in your browser. No data is stored on the server.

Content Protection Compliance

The extension automatically blocks media detection on DRM-protected streaming platforms including YouTube, Netflix, Disney+, Amazon Prime Video, Hulu, HBO Max, Apple TV+, Spotify, Twitch, and others. This is enforced at the code level and cannot be overridden by users.

Children's Privacy

This extension does not knowingly collect any information from children under 13 years of age.

Changes to This Policy

We may update this privacy policy from time to time. Any changes will be reflected on this page with an updated date.

Contact

If you have questions about this privacy policy, please email us at magi815@gmail.com or visit our Contact page.