Silk - Privacy Pass Client

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Client support for Privacy Pass anonymous authorization protocol.

Latest reviews

• (2025-07-10) Bug Cache: Page not found https://pp-attester-turnstile.research.cloudflare.com/ https://pp-attester-turnstile-dev.research.cloudflare.com/
• (2025-06-17) Max Booster: Not working anymore
• (2025-06-11) Shelley Murphy: This doesn't work with Cloudflare. It comes up, but times out and loops back to the Cloudflare 'verify you are human' doom loop.
• (2025-06-10) Ashton Woods: It does it's job, as far as I can tell
• (2025-05-27) Juyong Kim: Does not work at all
• (2025-05-04) Andrew Cottrell: https://demo-pat.research.cloudflare.com/login correctly identifies that this extension is installed, however the challenge fails every time with "[Cloudflare Turnstile] Error: 600010."
• (2025-04-13) Cheng Ching Hao -: nice and working
• (2025-04-11) yz450fproracer: It's horrible and never ever ever works, crashes every single time and is totally useless.
• (2025-03-23) Fabio R2024: Greyed out, does not work.
• (2025-02-05) Gareth Dickson: Doesn't work.
• (2024-07-15) Gwyneth Llewelyn: I'm not 100% sure about how exactly this is supposed to work. Note that I'm a fan of everything Cloudflare, and that's why I still have this extension turned on. However, I have increasingly been suspected of "not being human" — possibly because I'm using the Brave browser? It's Chromium underneath, obviously (or the extension wouldn't work!), but perhaps Brave blocks some additional things, managing to confuse Cloudflare. The point of "saving" a token so that you just need to get validated as being human once (or once per day...) makes a lot of sense, but it's not obvious how it works *now*. In the past, it *did* work in 100% of the cases, as others have reported. Currently... it's most a question of luck, I guess. Note that it's not easy to understand _what_ triggers the actual requirement for "human validation"; I have it appearing on my own websites, installed on my very own servers, which are also behind Cloudflare, but I would *assume* that, by now, Cloudflare would have "learned" that I'm supposed to be a legitimate user of my own websites — or so I would think. Granted, nothing can be worse than using Tor to browse the regular Web — you get validated twice, first (usually) by Cloudflare, and then by Google, which is _much_ worse and takes a lot of time, clicking on all those pictures until Google's happy... it's an annoyance in exchange for being able to browse the Web without being tracked.
• (2024-07-10) -: Advertised as an extension to fix issues with Cloudflare verification, while it just makes the verification problems worse. Not recommended.
• (2024-07-06) Teh Pigez: It works perfectly for my use case.
• (2024-06-30) Đức Nguyễn (Duke): I have been a user of this extension for years, and I find that it is very helpful (provided that you have a thorough understanding of its functionality). However, it is no longer as effective as it was in previous years, as the pass no longer provides the pass (it now simply resolves the challenge in front of you). The challenge is now more susceptible to failure; however, the convenience of the other successful attempts has already overtook it.
• (2024-06-05) J de Silva: I thought it was supposed to prevent challenges and pop-ups.
• (2024-05-22) J.M. Hardin: The challenge fails every time on a website that I need to access frequently.
• (2024-04-08) トンバ: 2024/04/08 hCaptcha認証が更新、人工物(雪ダルマ)をクリックする認証が追加 認証をスキップできないため現状この拡張を入れる意味が見いだせないです 2024/01/07 いつの間にかPrivacy PassからSilk - Privacy Pass Clientに代わっていたので更新 (2024年1月4日にv4.0.0として更新された模様) 旧仕様ではhCaptchaを認証するとパスが5枚貰え、パスがある場合は1枚消費してhCaptcha認証を自動スキップ。パスの数はアイコンクリックで確認できた。 Silkになってからはパスがなくなったらしく表示自体が消失 他の方のレビュー内にあるURLから動作確認ページを見た所、hCapchaを動かさずに認証したが そもそもシークレットウィンドウで開いても認証したのでこの拡張機能はいらないのかもしれない
• (2024-03-04) Isreal Oyarinde: I've been using it for a long time now, but the pop-ups of late are really annoying.
• (2024-01-19) Vincent Ybarra: What is going on with the pop-up interruptions?
• (2024-01-08) Vojtech Kom: Finally works after latest update..
• (2024-01-08) Vojtech Kom: Finally works after latest update..
• (2024-01-06) Charles Snipes: Happily used for probably a year. Is now causing constant pop-up interruptions. Had worked nicely in the background until now. Essentially broken now. Uninstalling.
• (2024-01-04) David Do: With the update that was announced on January 4, 2024 found over at blog.cloudflare[dot]com/privacy-pass-standard this extension causes the pp-attester-turnstile.research.cloudflare[dot]com/challenge page (the same shown in the screenshot depicting the privacy pass token validation page) to repeatedly pop up, over and over non-stop. Literally interrupting any internet browsing that is being done, even when idly watching a video and at the time of writing, up to this point, it has already popped up at least 8 times before automatically closing itself before allowing me to continue typing. Uninstalling the extension was the only way to prevent this incessant disruption of the "latest protocol version". This literally began occurring after a restart of chrome which I can only presume triggered an update of the extension. If this is happening to you, remove the extension and the repeated cloudfare popup tab will cease to interrupt.
• (2023-12-15) Luke Hoang: i never downloaded this and it was causing me problems
• (2023-12-08) Chiachi Cheng: 6 stars rating, and this is the one more than 5.
• (2023-11-30) Aaron Toponce: No longer works. Clicking on the extension to get more passes redirects to information pages instead of the ability to solve CAPTCHAs. Can no longer get passes.
• (2023-11-24) Lohengrin Percival: Does nothing.
• (2023-10-25) Toni Siik: Cannot get passes anymore.
• (2023-10-25) Toni Siik: Cannot get passes anymore.
• (2023-10-21) Pink Rose: its not working anymore not getting cloudfare tickets after completing serve it is still showing zero cloudfare tickets hope you will reply
• (2023-10-21) Pink Rose: its not working anymore not getting cloudfare tickets after completing serve it is still showing zero cloudfare tickets hope you will reply
• (2023-09-29) No veas Mi foto: La extencion se puede usar con los captchas de roblox?
• (2023-09-20) Ashi Ashi: Everyone, listen for a sec. No matter how many passes you have, you WILL see captchas. That's when you have to use those passes, they'll get you past the captcha just fine. It doesn't hide or block them! Unfortunately it doesn't work in my browser I use Vivaldi now, when I still used FireFox this extension worked well. I can't use FF anymore tho. I'm still on Windows 7 lol.
• (2023-09-20) Ashi Ashi: Everyone, listen for a sec. No matter how many passes you have, you WILL see captchas. That's when you have to use those passes, they'll get you past the captcha just fine. It doesn't hide or block them! Unfortunately it doesn't work in my browser I use Vivaldi now, when I still used FireFox this extension worked well. I can't use FF anymore tho. I'm still on Windows 7 lol.
• (2023-08-26) ポール: Doesn't work at all. When I visit Cloudflare protected sites, I still get the captcha even when I have passes available.
• (2023-08-26) ポール: Doesn't work at all. When I visit Cloudflare protected sites, I still get the captcha even when I have passes available.
• (2023-07-28) Steve Mmk: Haven't been able to obtain hCaptcha passes for over a year.
• (2023-07-28) Steve Mmk: Haven't been able to obtain hCaptcha passes for over a year.
• (2023-07-24) yueqiang wang: 可以免费翻墙的网站 从去年用到现在都没付过钱 https://go.91merry-1.top/auth/register?code=wh0XRG
• (2023-07-11) Malikul Akbar: developer being very slow response https://github.com/privacypass/challenge-bypass-extension/issues
• (2023-07-11) Malikul Akbar: developer being very slow response https://github.com/privacypass/challenge-bypass-extension/issues
• (2023-07-06) Alex Supremo: Absolutely BROKEN. I got 10 tickets for hCaptcha and still got the hCaptcha puzzle, and was charged 1 ticket for it! This kept happening: more hCaptcha and more tickets taken away. It's 🕑 time to fix this!
• (2023-07-06) Alex Supremo: Absolutely BROKEN. I got 10 tickets for hCaptcha and still got the hCaptcha puzzle, and was charged 1 ticket for it! This kept happening: more hCaptcha and more tickets taken away. It's 🕑 time to fix this!
• (2023-06-06) Aa Aa: My setup is Chrom on Ubuntu. I installed Privacy Pass to use it for Bitwarden's hCaptcha. I have 5 passes for hCaptcha now. However, I still need to solve the Bitwarden's hCaptcha. Not sure in the meanwhile what this extension is good for.
• (2023-06-06) Aa Aa: My setup is Chrom on Ubuntu. I installed Privacy Pass to use it for Bitwarden's hCaptcha. I have 5 passes for hCaptcha now. However, I still need to solve the Bitwarden's hCaptcha. Not sure in the meanwhile what this extension is good for.
• (2023-06-02) Da Bo: rubbish that stupit clodufrare captcha still showing with this rubbish, dont water your neves with other overpromising lie
• (2023-06-02) Da Bo: rubbish that stupit clodufrare captcha still showing with this rubbish, dont water your neves with other overpromising lie
• (2023-05-04) Martin (iMarbot): Doesn't work... I have 28 Cloudflare passes and 76 hCaptcha passes for what? Still get served Cloudflare and hCaptcha captchas every time.
• (2023-05-04) Martin (iMarbot): Doesn't work... I have 28 Cloudflare passes and 76 hCaptcha passes for what? Still get served Cloudflare and hCaptcha captchas every time.
• (2023-03-14) Atheophanous2: Doesn't work and breaks some sites.