# CookieBlock

> Automatically enforces cookie consent preferences to protect your privacy on any website you visit.

Canonical page: [https://chrome-stats.com/d/cookieblock](https://chrome-stats.com/d/cookieblock)

## Overview

- **ID:** `cookieblock`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** CookieBlock Team
- **Category:** privacy-security
- **Daily users:** 1,958
- **Weekly downloads:** 50
- **Rating:** 3.50 / 5 (22 ratings)
- **Version:** 1.1.0
- **Last updated:** 2022-08-04
- **First published:** 2021-04-28
- **Size:** 3.76 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/cookieblock/)
- **Website:** [https://karelkubicek.github.io/post/cookieblock](https://karelkubicek.github.io/post/cookieblock)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/cookieblock/privacy/](https://addons.mozilla.org/firefox/addon/cookieblock/privacy/)

## Description

**CookieBlock** is a powerful browser extension designed to protect your privacy by automatically enforcing your cookie consent preferences. Using advanced machine learning, it classifies cookies into four categories: Necessary, Functionality, Analytics, and Advertising, allowing you to selectively permit or block them with ease.

Unlike intrusive cookie banners, CookieBlock lets you define your policy once and guarantees that cookies you reject are actually removed, regardless of website honesty. Compatible with any website, it enhances privacy without interrupting your browsing experience. Developed by ETH Zürich researchers and featured at the USENIX Security Symposium, CookieBlock is an essential tool for modern web privacy.

## Rankings

- #2,191 — Overall
- #27 — cookie
- #28 — writer's block
- #44 — blockchain
- #66 — block ads
- #86 — unblock

## Permissions and access

### Permissions

- `<all_urls>`
- `cookies`
- `storage`
- `unlimitedStorage`
- `activeTab`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

CookieBlock is praised for its effective automatic removal of unnecessary cookies, enhancing user privacy with a client-side approach. However, multiple users report that it can break site functionality by removing essential cookies, necessitating frequent whitelisting and manual adjustments. The extension's interface is criticized for lacking clarity and control over its actions. Despite these issues, many appreciate its lightweight nature and contribution to reducing unwanted data collection, making it a valuable tool with room for improvement in usability and site compatibility.

### Pros

- Effectively removes unnecessary cookies without user intervention, enhancing privacy.
- Allows manual whitelisting or temporary disabling on specific sites for flexibility.
- Provides a unique client-based approach to respecting GDPR cookie consent.
- Easy to use and does not slow down the browser significantly.
- Helpful for blocking unwanted data collection and improving browsing experience.

### Cons

- Sometimes removes cookies that break site functionality (e.g., streaming sites like HBO, Disney+, or Gmail).
- The interface lacks transparency and control, making it hard to see or understand what is being blocked.
- Users need to manually configure exceptions often, which reduces automatic convenience.
- Some users report the extension does not block cookie consent popups as promised.
- Uninstall process is intrusive or cumbersome for some users.

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Source: [Chrome-Stats](https://chrome-stats.com/d/cookieblock)