This extension stores user-defined block/highlight data locally in browser extension storage only.

Data stored locally:
- Usernames and profile IDs added by the user
- Rule settings for posts, quotes, and topics
- Popup draft text and pop-out panel state

Data handling:
- No analytics
- No tracking pixels
- No third-party sharing
- No backend API calls
- No external transmission of user data

Data retention:
Data remains locally until removed by the user.

How users can delete data:
- Use "Clear All Block Rules" and "Clear All Highlight Rules" in the popup
- Remove individual entries in the popup
- Uninstall the extension
- Clear extension/app storage in browser settings