Privacy Policy

Last updated: February 15, 2026

Mandubun is a Chrome extension that helps you learn Korean by reading Naver Webtoons. This policy explains what data we collect, why, and how we protect it.

1. Data We Collect

Account Information

• Email address — collected when you sign in with Google. Used to identify your account and sync your progress across devices.

Learning Data

• Learning progress — vocabulary words practiced, XP earned, streak data, and episode completion.
• Webtoon metadata — series and episode identifiers from pages you visit while using the extension, used to provide translations for the content you are reading.
• Device timezone — used to correctly calculate daily streaks. Not used for location tracking.

Analytics

• Feature usage — we track how you interact with the extension to improve the learning experience. This includes sessions started and completed, practice activity, vocabulary answers, and chapter access. These events are tied to your account.

Error Reports

• Crash and error data — we collect error reports including browser version and extension version to help us fix bugs. No personal content or browsing history is included.

2. How We Use Your Data

• Provide translations and vocabulary features on Naver Webtoon pages
• Save and sync your learning progress
• Process payments for premium features
• Diagnose and fix technical issues
• Analyze feature usage to improve the learning experience

3. Third-Party Services

We use third-party service providers to help operate Mandubun, including providers for:

• Authentication — to securely manage sign-in
• Text recognition and translation — to extract and translate Korean text from webtoon images, processed on our servers
• Payment processing — to handle premium subscriptions
• Error monitoring — to detect and fix bugs

Webtoon image data sent for text recognition and translation is processed in real time and not stored by these providers beyond what is necessary to fulfill the request. We do not sell, rent, or share your personal data with third parties for marketing purposes.

4. Data Storage

• On your device — preferences and cached progress are stored locally in your browser.
• On our servers — your account, learning progress, and vocabulary data are stored securely on our servers.

5. Data Retention and Deletion

You can delete your account and all associated data by contacting us at support@mandubun.com. Upon account deletion, all server-side data will be removed. Local data can be cleared by uninstalling the extension.

6. Browser Permissions

The extension requests the following permissions:

• comic.naver.com — to display the translation overlay on webtoon pages
• image-comic.pstatic.net — to access webtoon panel images for text recognition
• api.mandubun.com — to communicate with our servers
• storage — to save your preferences locally
• tabs — to open login and payment pages

7. Children's Privacy

This extension is not directed at children under 13. We do not knowingly collect personal information from children under 13.

8. Changes to This Policy

We may update this policy from time to time. Changes will be posted on this page with an updated date.

9. Contact

If you have questions about this privacy policy, contact us at support@mandubun.com.