Chronocluster

Privacy Policy — ChronoCluster Live

Last updated: 2026-04-20

ChronoCluster Live is a Chrome extension that visualizes your own tab and navigation history as a live force-directed graph. This document describes exactly what it observes, where that data lives, and who else can see it.

TL;DR

Nothing leaves your computer. There are no servers, no analytics, no tracking, no third parties.

What the extension observes

To draw the graph, the extension listens to standard Chrome tab and navigation events:

• Tab lifecycle (chrome.tabs.onCreated, onUpdated, onRemoved) — so a node appears when you open a tab, updates when the URL or title changes, and dims when you close it.
• Navigation events (chrome.webNavigation.onCommitted, onCreatedNavigationTarget) — to determine which tab was opened from which other tab, so edges point parent → child.

For each observed tab, the extension records:

• the URL
• the page title
• the timestamp the tab was opened (and closed, if applicable)
• the parent/child relationship to other tabs
• an (x, y) position in the graph layout

Where the data lives

• IndexedDB — the main graph (nodes, edges, meta) is stored locally in an IndexedDB database named ChronoClusterGraph. It persists across browser restarts until you clear it.
• chrome.storage.session — two small lookup caches (chronocluster.lastNodeByTab, chronocluster.nodeForTab) that are automatically wiped when you close Chrome.

Both live on your machine, inside your Chrome profile. Neither is ever transmitted anywhere.

What the extension does not do

• No network requests. No telemetry. No crash reporting. No analytics.
• No content scripts. The extension never reads the contents of the pages you visit — only the URLs and titles Chrome already exposes to the tabs and webNavigation APIs.
• No host_permissions. No access to cookies, passwords, form data, or browsing inside incognito windows unless you explicitly allow it.
• No data sold, shared, or disclosed to any third party.
• No remote code loading. The extension ships with all code bundled at build time.

Permissions explained

The manifest.json declares three permissions, each the minimum required:

Permission	Why
tabs	Observe tab creation, updates, and closure to draw nodes.
webNavigation	Determine parent/child relationships (which tab spawned which).
storage	Maintain the per-tab routing cache in chrome.storage.session.

Your controls

• Clear button (top-right of the constellation page) wipes all recorded nodes, edges, and session cache after confirmation.
• Export button downloads a JSON snapshot of your graph for backup.
• Uninstall (chrome://extensions → Remove) removes the extension. To immediately delete the IndexedDB store as well, open DevTools on chrome-extension://<id>/ and use Application → Clear storage.

Children

ChronoCluster is not directed at children under 13 and does not knowingly collect any data at all.

Changes to this policy

Any update will be committed to this file in the public repository at https://github.com/Mintsolester/Chronocluster. The “Last updated” date above tracks the most recent change.

Contact

Questions, concerns, or reports: open an issue at https://github.com/Mintsolester/Chronocluster/issues.

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