Silk - Privacy Pass Client

Name: Silk - Privacy Pass Client
Rating: 3.1827 (717 reviews)
Author: Cloudflare Research

Client support for Privacy Pass anonymous authorization protocol.

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Silk - Privacy Pass Client is a Chrome extension designed to support the Privacy Pass anonymous authorization protocol. It provides unlinkable cryptographic tokens for websites that implement Privacy Pass, such as those protected by Cloudflare, improving your human signal and reducing friction during verification challenges.

The extension automates the token acquisition process: when a site requests a Privacy Pass token, Silk prompts you to complete the associated challenge. Upon successful completion, the extension securely obtains a token to streamline future access without compromising your privacy. This tool leverages Cloudflare Research's Privacy Pass providers and is ideal for users seeking enhanced privacy and seamless browsing on protected sites. For more details, FAQs, and troubleshooting, refer to the extension's official documentation and support links.

Add-on Privacy & Security Productivity Developer Tools

By:

Daily users:

Rating:

Version:

4.0.2 Last updated: 2024-04-04

Version code:

5714566

Creation date:

2017-09-18

Risk:

Permissions:

<all_urls>
storage
tabs
webRequest
webRequestBlocking

Size:

98.29KB

Email:

pr*****@cloudflare.com

URLs:

Website

Full description:

Source:

Firefox Browser Add-ons

Updated:

20 hours ago

Ranking

# 545 ▼ 2

Other rankings

#129 in Privacy & Security ▼ 1

#5 in privacy keyword 54 ▼ 1

#6 in data privacy keyword 33 ▼ 1

#26 in author keyword 9

#64 in associate keyword 6 ▼ 1

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Other platforms

Silk - Privacy Pass Client (v4.0.2)

300,000 2.30

(714)

User reviews

Most users report that the Silk - Privacy Pass Client Firefox add-on fails to prevent CAPTCHA loops and often exacerbates verification challenges. Several reviews mention the extension opens new tabs unexpectedly, disrupting browsing. It is noted as unreliable, sometimes failing to verify users, and causing duplicated verification steps. Complaints also highlight lack of recent updates, suggesting abandonment. Although intended to reduce CAPTCHAs and maintained by Cloudflare, its current performance is poor and intrusive, leading many to consider it ineffective or useless.

Pros

Can help reduce CAPTCHAs on some websites
Open-source and maintained by Cloudflare
Attempts to improve browsing experience by automating verification

Cons

Does not effectively stop CAPTCHA or "Verify you're human" loops
Recently introduces intrusive behavior such as opening new tabs without permission
Fails to verify users consistently, sometimes resulting in multiple CAPTCHAs
Appears abandoned with no recent updates or fixes
Compatibility issues with other extensions like uBlock causing loops or errors

Recent reviews

This garbage does NOT work; there is even an issue open about this bug since December 2024.

by An*****, 2025-05-29

this does not what it's supposed to do, you still get a myriad of time wasting challenges.

by Ke*****, 2025-05-08

by Fi*****, 2025-04-23

View all user reviews ›

Extension safety

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Silk - Privacy Pass Client requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Silk - Privacy Pass Client has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
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