PrivateGuard Privacy Policy

Last updated: October 3, 2026

PrivateGuard is a Chrome extension that moves the browsing history of websites you choose out of Chrome's history and address-bar suggestions into a private archive that only you can see. This policy explains what data the extension handles and how.

Summary

• The developer does not run any server and never receives your data.
• All data stays on your device unless you turn on optional Google Drive sync.
• If you turn on sync, your data is encrypted on your device with your password before upload. Neither Google nor the developer can read it.
• No analytics, no ads, no tracking, no selling or sharing of data.

Data the extension handles

• Browsing history (URLs, page titles, visit times) — only entries that match the rules you set. These are moved from Chrome history into the extension's local storage.
• Bookmarks — only when you explicitly choose to move matching bookmarks into the private archive.
• Your rules (sites and keywords) — stored in Chrome sync storage so they are available on all computers signed in to your Google account.
• Sync password — never stored or transmitted. Only an encryption key derived from it is stored locally on your device.

Optional Google Drive sync

If you turn on sync, the extension asks for permission to access only its own hidden application folder in your Google Drive (drive.appdata scope). It cannot see or modify any of your other Drive files. Your archive is compressed and encrypted on your device using AES-256-GCM with a key derived from your password (PBKDF2-SHA256, 600,000 iterations) before upload. If you forget your password, the cloud copy cannot be recovered.

You can turn off sync at any time. To delete the cloud copy, remove PrivateGuard's app data in Google Drive (Settings → Manage apps → PrivateGuard → Delete hidden app data).

Permissions

• history — find and move history entries that match your rules.
• bookmarks — move matching bookmarks into the archive, and restore them when you ask.
• storage, unlimitedStorage — keep your private archive and rules on your device.
• alarms — periodically check for new matching history and run sync.
• favicon — show site icons in the archive page.
• identity and access to www.googleapis.com — only for optional Google Drive sync.

Data retention and deletion

Your archive stays on your device until you delete entries in the extension or uninstall it. Uninstalling the extension deletes all local data. Cloud data remains in your Google Drive app folder until you delete it as described above.

Limited Use

PrivateGuard's use of information received from Google APIs adheres to the Chrome Web Store User Data Policy, including the Limited Use requirements.

Contact

Questions: szhao1025@gmail.com

PrivateGuard 隐私政策

最后更新：2026 年 10 月 3 日

• 开发者不运营任何服务器，不会收到你的任何数据。
• 所有数据默认只保存在你的设备上。
• 开启可选的 Google Drive 同步后，数据会先在你的设备上用你的密码加密（AES-256-GCM，PBKDF2-SHA256 60 万次迭代），再上传到你自己 Google Drive 的应用隐藏文件夹。Google 和开发者都无法读取。忘记密码则云端数据无法恢复。
• 扩展只读取和移动符合你所设规则的浏览记录和书签。
• 没有统计分析、广告或追踪，不出售、不共享任何数据。
• 卸载扩展会删除所有本地数据；云端数据可在 Google Drive「设置 → 管理应用 → PrivateGuard → 删除隐藏的应用数据」中删除。

联系方式：szhao1025@gmail.com