A privacy-focused Chrome extension that intercepts cookie consent banners and shows you exactly what you are agreeing to before you click "Accept All."
Ever click "Accept All" on cookie banners without knowing what you are agreeing to? This extension:
- Intercepts the "Accept All" button before it triggers
- Analyzes the cookies and trackers on the page
- Shows you a privacy score (0-100) and a detailed breakdown
- Lets you decide to accept, reject, or customize your preferences
Everything runs locally in your browser. No data is collected and nothing is sent to any server.
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Download this repository:
- Click the green Code button above
- Select Download ZIP
- Extract the ZIP file to a folder on your computer
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Install in Chrome:
- Open Chrome and go to
chrome://extensions/ - Enable Developer mode (toggle in the top-right corner)
- Click Load unpacked
- Select the extracted folder
- Open Chrome and go to
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You are done. The extension icon will appear in your toolbar.
Just browse normally. When you visit a site with a cookie banner and click "Accept All," the extension intercepts the click and shows you:
- A privacy score for the site
- The number of cookies by category (essential, analytics, advertising, third-party)
- Detected trackers
- The raw cookie, localStorage, and sessionStorage data the page is holding
Click the extension icon in your toolbar, then click View On-Device Data to see a complete privacy analysis of the site you are on. You can also right-click any page and choose Analyze Privacy on This Page from the context menu.
When the warning appears, you can:
- Reject All: clicks the site's reject button if one exists, otherwise hides the banner and clears non-essential cookies (session, CSRF, and auth cookies are preserved)
- Customize: opens the site's own cookie settings panel
- Accept Anyway: proceeds with accepting all cookies
Your choice is remembered per site. You can clear a single site's preference, or clear all of them, from the popup, or use the Clear Saved Preference for This Site context-menu item.
| Feature | Description |
|---|---|
| Smart detection | Detects banners from OneTrust, Cookiebot, TrustArc, Quantcast, Osano, CookieYes, and custom implementations |
| Privacy score | 0-100 score based on analytics, advertising, and third-party cookies plus detected trackers, with an HTTPS bonus |
| Raw data view | See all cookies, localStorage, and sessionStorage in table format |
| Cookie classification | Sorts cookies into essential, analytics, advertising, third-party, and unknown using a known-cookie table and pattern matching |
| Tracker detection | Identifies Google Analytics, Facebook Pixel, Hotjar, Microsoft Clarity, advertising networks, and more |
| Preference memory | Remembers your choice per website |
| Context menu | Right-click to analyze a page or clear a saved preference |
The score starts at 100 and applies deductions, with a small bonus for secure connections:
| Score | Rating | Meaning |
|---|---|---|
| 75-100 | Good | Minimal tracking, mostly essential cookies |
| 50-74 | Moderate | Some analytics and third-party cookies |
| 0-49 | Poor | Heavy tracking, multiple advertising cookies |
Deductions (capped per category): analytics cookies (3 pts each, max 15), advertising cookies (5 pts each, max 25), third-party cookies (4 pts each, max 20), and trackers (3 pts each, max 30). A site served over HTTPS earns a 5-point bonus.
The extension is built on Chrome's Manifest V3 architecture and is split into a few focused pieces:
cookie-detector.js: aCookieDetectorclass that holds per-platform banner selectors, classifies cookies, detects trackers from page scripts, resolves base domains (with multi-part TLD handling likeco.uk), groups related first-party domains (for example Google and YouTube), and computes the privacy score.content.js: runs on the page, finds the consent banner with a retry loop plus aMutationObserverfor banners that load late, intercepts the accept button acrossclick,mousedown, andtouchstart, and drives the reject and customize flows.warning-modal.js: renders the analysis modal with tabs for the score breakdown and the raw site data.background.js: the service worker that tracks stats, manages context menus, and brokers cookie operations.
The background service worker is written defensively, since a content script runs on every page:
- Cross-origin cookie requests are blocked. Cookie operations coming from a content script must target a domain related to the page's own host, so a script on one site cannot ask the worker for an unrelated origin's cookies (including HttpOnly cookies the page could not otherwise read).
- Sender validation. Messages are rejected unless they originate from this extension's own ID, which stops other installed extensions from reaching the message handlers.
- Scoped UI broadcasts. Block-state updates are sent only to UI views connected over a dedicated port, not broadcast to every open tab, so per-domain block preferences do not leak to unrelated pages.
- Incognito awareness. Incognito activity is excluded from the persisted event log and block list, and the in-memory event buffer is capped to limit what could be exposed in a memory dump.
Q: Does this block all cookies? A: No. It educates you about cookies and lets you reject non-essential ones when you choose to. It does not block everything automatically.
Q: Does the extension collect my data? A: No. All analysis happens locally in your browser. Nothing is sent anywhere.
Q: Why doesn't it work on some sites? A: Some sites use custom cookie banners that are not detected. You can still use View On-Device Data to see what is on the page.
| Permission | Why it is needed |
|---|---|
storage |
Save your preferences and statistics |
activeTab |
Analyze the current page |
scripting |
Inject the analysis scripts on demand |
contextMenus |
Provide the right-click analyze and clear-preference actions |
cookies |
Read and remove cookie information |
host_permissions (<all_urls>) |
Work on any website |
- Extension not working? Reload the page or restart Chrome.
- Modal not appearing? The site may use an unrecognized cookie banner.
- Stats not saving? Statistics and preferences are intentionally skipped in Incognito mode.
Having issues? Open an issue on GitHub.
This project is licensed under the MIT License. See LICENSE.
Version: 1.1.1 Last Updated: January 14, 2025
Made to promote digital privacy awareness.