Merlin
CookieBlock

CookieBlock

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

What is CookieBlock?
CookieBlock is a ground-breaking Firefox add-on that offers automatic enforcement of user-defined cookie consent on all websites. Using machine-learning technology, it categorizes and blocks or allows cookies based on user preferences. Developed by Information Security Group from ETH Zürich, it aims to protect your privacy without disturbing your browsing experience.
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Merlin
Stats
Rating: 3.57 (21)
Version: 1.1.0 (Last updated: 2022-08-04)
Creation date: 2021-04-28
Weekly download count: 60
Firefox on Android: No
Risk impact: Moderate risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
  • <all_urls>
  • cookies
  • storage
  • unlimitedStorage
  • activeTab
Size: 3.95M
Stats date:

Chrome-Stats Rank

# 2147 ▲ 10
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Other platforms

Not available on Chrome
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Merlin
Summary
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CookieBlock is a browser extension that allows you to automatically remove cookies that do not respect your privacy. Through the use of advanced machine-learning technology, it categorizes cookies into four distinct purposes. These are "Necessary", "Functionality", "Analytics" and "Advertising", which the user then has the power to permit or reject individually.

Unlike nagging cookie banners that interrupt your browsing experience, CookieBlock only requires that you define your policy once, and guarantees that the types of cookies you reject are actually removed from your browser. Moreover, CookieBlock works on any website you visit, and does not rely on the honesty of the website host.

As a result, CookieBlock perfectly complements extensions that seek to remove annoying cookie banners from your browsing experience, allowing you to preserve your privacy at the same time.

This add-on has been built by members of the Information Security Group of the Computer Science Department at ETH Zürich, and was developed as part of the master thesis "Analyzing Cookies Compliance with the GDPR" .

It is also featured at the 31st USENIX Security Symposium: https://www.usenix.org/conference/usenixsecurity22/presentation/bollinger

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Easy to use
  • Works without slowing the browser
  • Can whitelist specific sites
  • Automatically deletes unnecessary cookies
Cons
  • Can break functionality of some websites
  • Removes too many essential cookies
  • Does not provide clear control over settings
  • Uninstalling requires survey completion
Most mentioned
  • Blocks/Deletes cookies
  • Breaks some websites
  • Ability to whitelist exceptions
Recent reviews
Best one. I see some comments complaining that this extension breaks some webpages. YES, exactly, because those webpages don't comply with what you choose to do with their cookies. Anyway, don't worry if it breaks something, you can white list specific sites or pause the add on for a while.
by Awe, 2023-10-19
View all user reviews
Safety
Risk impact

CookieBlock may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.

Risk likelihood

CookieBlock has earned a fairly good reputation and likely can be trusted.

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Screenshots
CookieBlock