🍪 Cookie Sentinel

See everything your browser stores. Search, edit, analyze, export.
Unified cookie & storage inspector with privacy scoring.

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Features

Feature	Description
Unified View	Cookies, localStorage, sessionStorage, IndexedDB, and Cache Storage — all in one panel
Search & Filter	Search across ALL storage types by key, value, or domain
CRUD Operations	Create, read, update, delete any storage entry
Cookie Classification	Auto-classify cookies as Essential / Functional / Analytics / Tracking
Privacy Score	Per-site privacy score (0–100) based on cookie/tracker analysis
Snapshot Diff	Take snapshots before & after actions, see exactly what changed
Export / Import	Export all storage as JSON for debugging or sharing
Quick Popup	Glanceable summary with one-click export and clear-all
DevTools Panel	Full-featured inspector integrated into Chrome/Firefox DevTools

Screens

Install

From Source (Development)

# Clone
git clone https://github.com/user/cookie-monster.git
cd cookie-monster

# Install dependencies
pnpm install

# Development build with hot reload
pnpm dev

Then load in Chrome:

1. Navigate to chrome://extensions
2. Enable Developer mode
3. Click Load unpacked
4. Select the dist/ folder

From Store

• Chrome Web Store: Coming soon
• Firefox Add-ons: Coming soon Note: Use github release for installing extensions/addons for now.

Comparison

Feature	Cookie Sentinel	EditThisCookie	DevTools Built-in
Manifest V3	✅	❌ (MV2)	N/A
Unified storage view	✅	❌	❌ (separate tabs)
Cookie classification	✅	❌	❌
Privacy score	✅	❌	❌
Snapshot diff	✅	❌	❌
IndexedDB browser	✅	❌	✅
Cache Storage browser	✅	❌	✅
Export/Import	✅	✅	❌
Search all types	✅	❌	Partial
Sensitive value masking	✅	❌	❌
Open source	✅	✅	N/A

Usage

DevTools Panel

1. Open DevTools (F12 or Cmd+Opt+I)
2. Navigate to the Cookie Sentinel tab
3. Browse all storage entries in the unified view
4. Use the search bar to filter by key, value, or domain
5. Click any entry to see full details (value, metadata, classification)

Popup

Click the extension icon in the toolbar for a quick summary:

• Privacy score at a glance
• Storage counts per type
• One-click export and clear-all

Privacy Score

Cookie Sentinel rates each site from 0 to 100:

Score	Rating	Meaning
80–100	🟢 Excellent	Minimal tracking, mostly essential cookies
60–79	🟡 Good	Some analytics, limited tracking
40–59	🟠 Fair	Multiple trackers or third-party cookies
0–39	🔴 Poor	Heavy tracking, many third-party cookies

Classification uses a bundled rules database — no external requests are made.

Development

Prerequisites

• Node.js >= 18
• pnpm >= 9

Security

• Sensitive cookie values (session, token, auth, CSRF) are masked by default
• HttpOnly cookies read via chrome.cookies API, never via injected scripts
• All values rendered as textContent to prevent XSS
• Export warns about potentially sensitive data
• Classification database is bundled — zero external network requests
• Extension collects no telemetry or analytics whatsoever

Contributing

See CONTRIBUTING.md for guidelines.

License

MIT — Use it, fork it, ship it.