Privacy Policy — TimeFocuser

1. Overview & Core Philosophy

TimeFocuser ("we", "our", or "the extension") is a privacy-first, serverless browser extension designed to help users eliminate distractions and maintain deep focus by scheduling website blocking.

        Our Guarantee: TimeFocuser operates entirely locally on your device. We do not collect, transmit, store, or sell any personal data, browsing history, or analytics. There are no remote tracking servers, third-party analytics scripts, or external databases involved in its operation.
      

2. Data Collection & Storage

TimeFocuser does not operate any backend server. All information necessary for the extension to function remains strictly within your browser's local sandbox:

Custom Blocking Rules: The domains, URLs, and wildcard patterns you designate to block.
Schedules & Timers: The days, start/end hours, and timer durations configured for your focus periods.
Focus Statistics: Local counters for focus sessions completed and blocks intercepted.
Cryptographic Integrity Keys: Non-extractable encryption keys generated via the browser's Web Crypto API to ensure your rules cannot be manipulated while active.

All rule configurations are encrypted locally using AES-256-GCM and verified with HMAC-SHA256 signatures stored in browser chrome.storage.local and IndexedDB.

3. Permissions Used & Why

TimeFocuser adheres to the principle of least privilege. It only requests permissions that are strictly necessary to deliver website blocking and tamper-prevention:

Permission	Purpose
`storage`	Persists your custom blocking rules, schedules, and cryptographic verification keys locally on your computer.
`declarativeNetRequest`	Enforces high-speed, network-level redirects to the local blocker landing page before blocked websites load.
`webNavigation`	Detects top-level navigation attempts to matching blocked websites and redirects to the calm blocked screen.
`alarms`	Runs periodic local background checks (every minute) to transition firewall states according to your focus schedule.
`tabs`	Identifies the active browser tab to redirect it to the local blocked page when a restricted website is navigated to.
`<all_urls>` (Host Permission)	Required because users can designate any custom domain or URL on the internet to be blocked by the firewall.

4. Third-Party Sharing & Disclosure

We do not sell, rent, trade, or transfer any user information to third parties. Specifically:

No user data is ever sold to data brokers or advertisers.
No data is shared with third parties for analytics, marketing, or advertising.
No data is processed for creditworthiness or lending evaluations.

5. Feedback & Optional Uninstall Survey

If you choose to submit feedback via our optional feedback form upon uninstalling or through the extension options, any text you voluntarily provide is submitted directly to an official Google Form for product improvement. No identifying computer data or personal identifiers are attached to such submissions.

6. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in legal requirements or extension updates. Any updates will be posted to this page with an updated revision date.

7. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy, you can reach out via:

Email: a.e.fogord@gmail.com
GitHub Repository: github.com/Fogord/time-focuser