Privacy Policy

This policy explains how GroupBlock handles your data. Spoiler: we don't collect any.

Last updated: March 2026

✦ TL;DR — The short version

GroupBlock collects zero personal data — no names, emails, or identifiers.

All settings are stored locally on your device only.

No data is ever sent to any server, third party, or cloud.

The extension works 100% offline with zero external requests.

1 Overview

GroupBlock ("the Extension") is a Chrome browser extension that enables users to block websites by category for the purposes of parental control and productivity. This Privacy Policy describes how the Extension handles information.

By installing or using GroupBlock, you agree to the terms described in this policy.

2 Data We Do Not Collect

GroupBlock does not collect, store, transmit, or process any of the following:

Personal identification information (name, email, address)
Browsing history, URLs visited, or web activity
Device identifiers, IP addresses, or location data
Usage statistics, analytics, or telemetry
Passwords (they are hashed locally and never leave your device)
Any data related to the websites you block or visit

3 Data Stored Locally

The Extension stores the following data exclusively on your local device using Chrome's chrome.storage.local API:

Your selected category preferences (which categories are enabled or disabled)
Custom domains you have added to block lists
Scheduling settings (active hours and days)
A SHA-256 hash of your password, if you choose to set one
Your selected interface language

This data never leaves your browser. It is not synced to any cloud service, account, or remote server.

4 Permissions Explained

GroupBlock requests the following Chrome permissions. Each is necessary for the Extension to function:

Permission	Why it's needed
storage	To save your settings (enabled categories, schedule, password hash) locally on your device.
declarativeNetRequest	To block network requests to domains in your active categories.
declarativeNetRequestWithHostAccess	Required by Chrome for declarativeNetRequest to operate across all URLs.
alarms	To enable scheduled blocking — activating and deactivating blocks at specified hours.
host_permissions (<all_urls>)	Required for the blocking engine to intercept requests to any domain you configure.

5 No Third-Party Sharing

GroupBlock does not share any data with third parties because it does not collect any data in the first place. The Extension has no partnerships, advertising integrations, or analytics services.

No third-party SDKs, libraries, or services are loaded at runtime. All code runs entirely within your browser, offline.

6 Children's Privacy

GroupBlock is designed as a parental control tool and may be used to protect children online. The Extension does not knowingly collect personal information from children or adults. No personal data is collected from any user regardless of age.

7 Security

Because GroupBlock stores all data locally and makes no network requests, there is no risk of data interception in transit or server-side breaches. Your password, if set, is stored only as a SHA-256 cryptographic hash — it cannot be reversed or recovered.

8 Changes to This Policy

If this Privacy Policy is updated, the new version will be published at this URL. The "Last updated" date at the top of the page will reflect any changes. Continued use of the Extension after any update constitutes acceptance of the revised policy.

9 Contact

If you have questions about this Privacy Policy or about GroupBlock, you can reach the developer via the Chrome Web Store listing page.

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Developer support

Chrome Web Store · GroupBlock listing page