@privacytests

Open-source tests of web browser privacy. Developed and maintained by @arthuredelstein. Follow @privacytests for the latest browser test results!

 the World Wide Web
privacytests.org/
Joined July 2020
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privacytests.org/

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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If this is the case, @Firefox, why don't you do more by default? Why don't you block most tracking content by default? Or block tracking query parameters? Or send the Global Privacy Control header? If you really want to protect your users, you need to do more. Privacy by default is the way.
Firefox
@firefox22h
Replying to @firefox
While the internet got worse. Firefox got better. We're built to protect, not track you, with AI on your terms, and ad blocker support. It’s time to come back to Firefox. mzl.la/welcomebackX 3/3
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All of these protections are already built into Firefox, but they are turned *off* by default. It's a choice not to enable these protections by default: there's no technical obstacle.
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Issue 105 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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Issue 104 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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privacytests.org retweeted
profdeibert@RonDeibertOct 15
NEW @citizenlab report We uncovered an Israeli firm using online ads to run vast spy operation This is the first-ever public confirmation of zero-click mercenary spyware delivered via targeted ads. 45 devices at @AJEnglish confirmed infected citizenlab.ca/research/how-d…

Exposing AdFection: How Discover-Tech Turned Targeted Ads Into a Pipeline for Zero-Click Mercenary...

This is the first-ever public confirmation of zero-click mercenary spyware delivered via targeted ads. We call the technique AdFection, and show how it was used to infect devices at Al Jazeera with...

citizenlab.ca
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Issue 103 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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New this issue: dark mode! 😎
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Issue 102 of PrivacyTests.org it out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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Issue 101 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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Issue 100 of PrivacyTests.org is out today! 🎂

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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Issue 99 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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Issue 98 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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Issue 97 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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Issue 96 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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It's been a long hiatus since the last update. Thank you to everyone for your patience! ❤️
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The biggest change since last issue is that we are orchestrating the tests on GitHub Actions! All desktop tests now run on macOS instances. The mobile tests are still running on local hardware, but are controlled by GitHub Actions. We hope this new design means we can focus less on coaxing test runs to completion, and more on developing tests. Also it hopefully means that we can run tests and publish test results more frequently.
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We're very pleased to introduce Project Timestamper, an open-source initiative to protect humanity's cultural and scientific heritage from AI forgery. projecttimestamper.org

Project Timestamper

Preserving the integrity of humanity's cultural and scientific achievements

projecttimestamper.org
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.@Mozilla, if encryption is our last line of defense, you should be enabling HTTPS-Only Mode in @firefox by default. It's still disabled, even in Private Browsing windows. That means Firefox still makes unencrypted connections to websites without warning users. Look:
Mozilla
@mozilla19 Mar 2025
It's really simple. Encryption is our last line of defense for digital #privacy. Once it’s compromised, there’s no undoing it. Sign our petition and demand French lawmakers reject this dangerous amendment✒️👇mzl.la/4itihS2 @signalapp @mer__edith
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Here are more details about HTTPS-Only Mode: blog.mozilla.org/security/20…

Firefox 83 introduces HTTPS-Only Mode – Mozilla Security Blog

  Security on the web matters. Whenever you connect to a web page and enter a password, a credit card number, or other sensitive information, you want to be sure ...

blog.mozilla.org
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Issue 94 of PrivacyTests.org is out today!

Which browsers are best for privacy?

An open-source privacy audit of popular web browsers.

privacytests.org
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