Privacy Policy

This Privacy Policy applies to the Bilibili History Extension (hereinafter referred to as "the Extension"), created by the developer as a free service. This service is provided "AS IS".

Core Privacy Principles

The Extension prioritizes user privacy. All data is stored locally on the user device, and synchronization only occurs during user-initiated operations. The Extension does not collect any personal user information.

Information Collection and Use

The Extension strictly adheres to privacy protection principles and does not collect any personal user information. The Extension only processes the following necessary data when users actively initiate operations:

• Viewing History: Only saves information about videos you've watched on the Bilibili website (title, author, viewing time, etc.). This data is completely stored locally in your browser
• Watch Later List: Only saves information about videos in your "watch later" list. This data is completely stored locally in your browser
• User Settings: Only saves your personal preferences set within the Extension (such as sync intervals, deletion options, etc.)

Data Storage

• Local Storage: All data is stored in your browser's local storage space
• No Cloud Storage: Data is not uploaded to any third-party servers or cloud services
• User Control: You have complete control over all data and can view, export, delete, or clear it at any time

Data Synchronization

All data synchronization behavior of the Extension only occurs during user-initiated operations, including:

• When users manually trigger synchronization
• When users actively open the Extension to view history
• When users actively set sync-related options
• When users actively import or export data

The Extension does not automatically collect or synchronize any data in the background.

Third-Party Services

• Bilibili API: The Extension only communicates with Bilibili's official API during user-initiated operations to obtain necessary history and "watch later" data
• WebDAV Services: Only communicates with user-specified WebDAV servers when users actively configure and use cloud sync functionality
• Other Third Parties: The Extension does not connect to any other third-party services or collect any third-party data

Privacy Protection Commitments

• No Personal Information Collection: Does not collect personal identity information such as names, emails, phone numbers, location information, etc.
• No User Behavior Tracking: Does not track your browsing behavior, usage patterns, or other data
• No User Data Analysis: Does not perform any commercial analysis or user profiling on stored data
• No Data Sharing: Will not share, sell, or leak your data to any third parties

Opt-Out Rights

You can completely control your data through the following methods:

• View Data: View all stored data in the Extension at any time
• Export Data: Export data in JSON or CSV format
• Import Data: Restore data from backup files
• Delete Data: Selectively delete specific data or clear all data with one click
• Uninstall Extension: Uninstalling the Extension will completely delete all locally stored data

Children's Privacy

The Extension does not intentionally collect information from children under 13 years old and does not market to children. Parents are advised to supervise minors' browser usage.

Security Measures

• Local Encryption: Appropriate protection measures are applied when sensitive data is stored locally
• No Network Transmission: Data is not transmitted over the internet except during user-initiated operations
• User Authorization: All data access and operations require explicit user authorization

Policy Updates

This Privacy Policy may be revised according to feature updates. In case of significant changes, users will be clearly informed in the Extension update notes. Continued use of the Extension indicates your agreement to the updated Privacy Policy.

This Privacy Policy is effective as of 2025-11-06

Your Consent

By installing and using this Extension, you agree to the processing of your relevant data in accordance with this Privacy Policy.

Contact Us

If you have any questions about this Privacy Policy, please contact us through the following methods:

Email:extend@cosr.eu.org

Important Note: The Extension strictly adheres to the above privacy commitments and will never collect, sell, or misuse any personal user information. User privacy protection is our top priority.