Last updated: 2026-06-11
Gaze Guard is a Chrome extension that uses your webcam to detect whether an extra face is looking at your screen from within a configurable distance, and triggers a visual alert (and optional tab switch) when so. This document describes how the extension handles user data.
One-line summary: The extension does not collect, store, or upload any data, and makes no network requests at runtime.
None. All processing runs locally on your machine:
getUserMedia are fed to MediaPipe Face Landmarker for face detection. Frames are never stored, never transmitted to any server.The extension uses chrome.storage.local to persist your preferences on your browser only. Nothing is synced to any cloud:
Clearing browser data or removing the extension permanently deletes these.
The extension makes no network requests at runtime. All MediaPipe models and the WebAssembly runtime are bundled in the extension package and run fully offline after installation from the Chrome Web Store.
The only external link is when you manually click the “Support me on Ko-fi” button in the popup, which opens a new tab to https://ko-fi.com/steepinglogic. From there, Ko-fi’s own privacy policy applies: https://ko-fi.com/manage/privacypolicy
| Permission | Purpose |
|---|---|
tabs |
Switch to a user-configured safe tab when peeking is detected. |
scripting |
Inject the overlay alert into the active tab. |
notifications |
Surface a system notification when peeking is detected. |
offscreen |
Run the MediaPipe detection loop in a background document (service workers cannot access getUserMedia). |
storage |
Persist user preferences (see section 2). |
<all_urls> host permission |
The overlay must be able to render on whatever tab you happen to be viewing. We do not read page contents — we only insert a Shadow DOM container for the alert. |
This extension uses the following third-party open-source components. Licensing and source URLs are listed in NOTICE.md:
These components run entirely locally and do not report any data to Google or any third party.
This extension does not target children under 13 and collects no data of any kind.
Future changes will update the “Last updated” date at the top. Material changes will be noted in the GitHub repository’s release notes.
Open an issue on the GitHub repository: https://github.com/steepinglogic/gaze-guard/issues
Or email: steepinglogic@gmail.com
Gaze Guard 窺探守衛是一款 Chrome 擴充功能，當 webcam 偵測到一定距離內有額外的人臉時，會在當前分頁顯示視覺提醒並可選擇切換分頁。本文件說明本擴充功能如何處理使用者資料。
一句話結論：本擴充功能不收集、不儲存、不上傳任何資料，也不在執行時發出任何網路請求。
沒有。 本擴充功能完全在你的本機執行：
getUserMedia 取得，傳入 MediaPipe Face Landmarker 進行人臉偵測，影格從未被儲存、從未被傳輸到任何伺服器。本擴充功能使用 chrome.storage.local 儲存以下「使用者偏好設定」於你的瀏覽器本機，不會同步到任何雲端：
清除瀏覽器資料或移除擴充功能即可永久刪除這些設定。
本擴充功能在執行時不會發出任何網路請求。 所有 MediaPipe 模型與 WebAssembly runtime 都已打包在擴充功能本體中，從 Chrome Web Store 安裝後即離線運作。
唯一的外連是當使用者主動點擊 popup 內的「Support me on Ko-fi」按鈕時，會開新分頁前往 https://ko-fi.com/steepinglogic。此後的資料處理由 Ko-fi 自身的隱私政策接管：https://ko-fi.com/manage/privacypolicy
| 權限 | 用途 |
|---|---|
tabs |
在偵測到偷看時，切換到使用者預先指定的安全分頁 |
scripting |
將視覺提醒 overlay 注入當前分頁 |
notifications |
顯示系統通知 |
offscreen |
在背景文件中執行 MediaPipe 偵測迴圈（service worker 無法存取 getUserMedia） |
storage |
儲存使用者設定（見第 2 節） |
<all_urls> host permission |
overlay 必須能注入「使用者當前看的分頁」，無法事先收斂。我們不會讀取頁面內容，僅插入一個 Shadow DOM 容器用於顯示提醒。 |
本擴充功能使用以下第三方開源元件，授權與來源列於 NOTICE.md：
這些元件完全在本機執行，不會回傳資料給 Google 或任何第三方。
本擴充功能不主動針對 13 歲以下兒童，也不蒐集任何資料。
未來如有變更，將更新本頁面頂端的 “Last updated” 日期。重大變更會在 GitHub repo 的 release notes 中註明。
於 GitHub repo 開 issue：https://github.com/steepinglogic/gaze-guard/issues
或寄信至：steepinglogic@gmail.com