Privacy Policy — Serene Guardian

Last updated: March 27, 2026

Overview

Serene Guardian ("the Extension") is a parental controls browser extension. We are committed to protecting your privacy. This policy explains what data the Extension accesses and how it is handled.

Data Collection

We do not collect, transmit, or store any personal data on external servers.

All data generated by the Extension — including settings, activity logs, PIN, and subscription status — is stored exclusively in your browser's local storage (chrome.storage.local). This data never leaves your device except in the following limited case:

Subscription Verification

When you verify a premium subscription, your email address only is sent to our secure server-side proxy (hosted on Cloudflare Workers) to check your subscription status with our payment provider (DodoPayments). This request:

Contains only your email address
Is transmitted over HTTPS
Is not logged or stored on our server
Is rate-limited to prevent abuse

No other data is ever transmitted.

Data Stored Locally

The Extension stores the following in chrome.storage.local on your device:

Data	Purpose
Filter settings	Which categories are blocked, age setting
Whitelisted/blocked domains	User-configured domain lists
Schedule blocks	Bedtime, homework, custom time restrictions
Activity logs	Domains blocked, timestamps, categories (last 200 entries)
Screen time data	Minutes browsed today (resets daily)
Parent PIN	Used to lock the Extension UI and unblock sites
PIN attempt history	Timestamps of successful/failed PIN entries
Subscription status	Email, status, and period end date
Content masking settings	Toggle states, custom word list

We do not share, sell, or transfer any user data to third parties. We do not use analytics, tracking pixels, or advertising SDKs.

Permissions Justification

Permission	Why it's needed
`storage`	Save settings, logs, and preferences locally
`tabs`	Monitor active tab for screen time tracking
`webNavigation`	Detect page navigation to enforce blocking rules and schedules
`alarms`	Schedule daily resets, screen time ticks, pause timers, and temp unlock expiration
`declarativeNetRequest`	Block or redirect URLs matching filter rules
`declarativeNetRequestFeedback`	Log which requests were blocked for the activity log
`sidePanel`	Display the parental controls dashboard in Chrome's sidebar
`<all_urls>` (host permission)	Required to scan and filter content on any website the child visits

Content Scripts

The Extension injects a content script on all pages to:

Check if the current URL should be blocked (via background script)
Scan visible text for inappropriate content and mask it (content masking feature)
Display a block overlay if the site is restricted

The content script does not read passwords, form data, or any input fields. It does not transmit any page content externally.

Children's Privacy

This Extension is designed to be configured by a parent or guardian. The child using the monitored browser does not create an account or provide personal information. The Extension does not knowingly collect data from children.

Data Retention

Activity logs are capped at 200 entries and can be cleared at any time by the parent.
Screen time data resets daily.
All data can be permanently deleted by uninstalling the Extension.

Changes to This Policy

We may update this privacy policy from time to time. Changes will be reflected in the "Last updated" date above.

Contact

If you have questions about this privacy policy, contact us at:

Email: info@zuardyan.com