# Privacy Policy for Substack Downloader – Video, Audio & Podcast MP4/MP3
**Last Updated:** January 8, 2026
## 1. Introduction
This Privacy Policy explains how **Substack Downloader – Video, Audio & Podcast MP4/MP3** ("we", "us", or "the extension") handles your data. We are committed to protecting your privacy. This extension is designed to run locally on your device and does not collect, store, or transmit your personal data to any external servers.
## 2. Data Collection and Usage
### Personal Data
**We do not collect any personal data.** We do not track your browsing history, your search queries, your IP address, or any other personally identifiable information.
### Local Storage
The extension uses your browser's local storage API (`chrome.storage.local`) for the following purposes:
- **User Preferences:** To save your settings, such as preferred download quality, file naming conventions, and theme choices.
- **Download History:** To store a local list of the files you have downloaded using the extension. This history is stored solely on your device and is not shared with us or any third parties. You can clear this history at any time through the extension's interface.
- **Usage Counters:** To track the number of successful downloads locally in order to trigger optional support notifications.
## 3. Permissions
To function correctly, the extension requires specific permissions from your browser. Here is why we need them:
- **`downloads`**: Required to save video and audio files to your computer's "Downloads" folder.
- **`storage`**: Required to save your settings and download history locally on your device.
- **`activeTab`**: Required to allow the extension to detect media on the specific tab you are currently viewing when you click the extension icon.
- **`<all_urls>` (Host Permissions)**: Required to allow the extension to work on any Substack publication, including those that use custom domains (e.g., `piratewires.com` instead of `substack.com`). The extension scans pages for media only when you visit them; it does not track your browsing activity across other sites.
## 4. Third-Party Services
This extension does not use any third-party analytics services (like Google Analytics).
### Buy Me A Coffee
The extension includes a link to "Buy Me A Coffee" to allow users to support the developer. Clicking this link will open a separate tab to `buymeacoffee.com`. Their privacy policy governs your interactions on their website.
## 5. Changes to This Policy
We may update this Privacy Policy from time to time to reflect changes in our practices or for other operational, legal, or regulatory reasons. If we make material changes, we will notify you by updating the date at the top of this policy.
## 6. Contact Us
If you have questions about this Privacy Policy, please contact the developer via the support link on the Chrome Web Store listing.