privacytests.org
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Open-source tests of web browser privacy. Developed and maintained by @arthuredelstein . Follow @privacytests for the latest browser test results!
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Pinned Tweet
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Browser privacy update
Now that Firefox Desktop has fixed its Blob leak, the browser is passing all of 's State Partitioning (cross-site data leak) tests! And this fix has propagated to LibreWolf as well.
Firefox and LibreWolf join Brave, Mullvad, and Tor…
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Issue 51 of is out today!
New in this issue: testing Mullvad Browser.
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Browser privacy update
In the latest version of , we can see progress in privacy protections: Safari 17.2 has partitioned the Blob API, joining Brave and Firefox-based browsers. Now only Chrome and some Chrome-derived browsers are still leaking data…
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More good privacy news!
The latest test results on confirm that Firefox Nightly and Safari Technology Preview have now fixed their longstanding cross-site Blob leaks. That means we're no longer observing any leaks of tracking data between websites in…
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Issue 19 of is out today!
Includes test results for the latest browser versions, plus Firefox Focus on Android is tested for the first time.
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Issue 3 of is out today with tests of the latest browsers. New tests have been run for the first time:
- Alt-Svc tracking test
- System font fingerprinting test
- Tor stream isolation test (on browsers that use Tor, including
@brave
and
@torproject
)
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This tweet is problematic because Firefox
- does not block common tracking scripts by default
- does not protect against common fingerprinting leaks by default
- does not protect against tracking via query parameters by default
(Details at )
When you’re offline, dance like no one’s watching.
When you’re online, dance like no one’s tracking (bc you’re using Firefox 😌)
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Browser privacy update
More good news! In the latest issue of , we can see that Opera on Desktop has now shipped the State Partitioning protections recently developed and deployed by the Chromium team.
These State Partitioning protections keep data from…
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Issue 84 of is out today!
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Browser Privacy update
I'm happy to be able to report further important progress in browser privacy. New anti-tracking protections introduced in Chrome have now been deployed by
@MicrosoftEdge
.
Specifically, Chrome and Edge have now fixed most browser features that previously…
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Exciting Web Privacy News
The Web is undergoing a significant advance in privacy at the moment. In recent weeks, the Chrome browser enabled cross-site storage partitioning. That is: many features in Chrome that used to leak data between websites, no longer leak.
In Chrome 117,…
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Issue 85 of is out today!
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Issue 20 of is out today!
New in this issue: testing Mull browser on Android.
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Browser Privacy Testing Update
Last week, in the latest issue of , I introduced results from new tests that examine whether common web browsers are leaking the names of the websites you visit via the DNS protocol. The short answer is "😱" but there's hope…
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Browser Privacy Progress Update
In the latest version of (Issue 77), we see that Vivaldi desktop has now adopted substantial State Partitioning protections, joining all other desktop browsers in protecting users against cross-site data leaks.…
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113
Today's browser testing results show a big privacy and security advance for
@torproject
's Tor Browser: starting with Tor Browser 11.5, all connections to the web are now secure by default (using HTTPS).
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Issue 86 of is out today!
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Issue 22 of is out today!
New in this issue: a test for whether browsers protect against cross-site tracking via the CookieStore API.
Thanks to
@s_englehardt
for creating this test!
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If you're using Firefox and you want to block third-party tracking scripts and tracking pixels, you need to turn on Firefox Strict Mode. Firefox doesn't block most tracking content by default.
Here’s a step by step guide on how to block third-party trackers: Use Firefox. Done.
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Here's a key reason to use a web browser that protects your privacy.
(I'm regularly testing browsers and comparing their privacy properties at .)
The NSA has confirmed to my office in an unclassified letter that the agency is purchasing Americans' internet browsing data without a warrant. I'm calling on DNI Haines to stop intelligence agencies from buying up Americans' private data being sold illegally by data brokers.
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Issue 72 of is out today!
Web browsers leak your data! PrivacyTests measures those leaks.
Click here to see which browsers are best for privacy:
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Issue 32 of is out today!
New this issue: a "getDirectory" partitioning test.
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Issue 27 of is out today!
A big advance in web privacy can be seen in today's results: thanks to the rollout of Total Cookie Protection, fresh profiles of the latest version of
@Firefox
are now passing nearly all State Partitioning tests.
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Issue 15 of is out today!
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Total Cookie Protection is the feature that allows Firefox to pass (nearly) all State Partitioning tests on .
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Issue 24 of is out today! See what privacy leaks are found in different web browsers.
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Good news from
@Firefox
! Hoping several other browsers will also close this loophole:
Gecko: Intent to Ship: Blob URL Partitioning (Total Cookie Protection)
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Today I am publishing a response to Vivaldi's claims about :
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Issue 13 of is out with the latest web browser versions!
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@thezedwards
@DuckDuckGo
You can see similar results for desktop and mobile browsers on
(See the tracker content blocking section at the bottom of each page.)
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Issue 29 of is out today with the latest results on web browser privacy!
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Hi everyone -- developer here (
@arthuredelstein
). I am very happy to say that I have started work at Brave today as a research and privacy engineer. 🧵 (1/5)
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These web browsers stop all
#cookies
from tracking your browsing history:
✅ Brave
✅ Bromite
✅ DuckDuckGo
✅ LibreWolf
✅ Safari
✅ Tor Browser
✅ Ungoogled Chromium
These don't:
❌ Chrome
❌ Edge
❌ Firefox
❌ Opera
❌ Samsung
❌ Vivaldi
❌ Yandex
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Issue 10 of is out today.
Now testing LibreWolf on desktop!
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I'm happy to report that Vivaldi no longer shows this confusing welcome page. It has been replaced with a new, clearer, welcome sequence, which is a significant improvement. Thank you,
@vivaldibrowser
and
@jonsvt
!
@gribouille450
@korenisko
@vivaldibrowser
The Vivaldi setup is not so easy. Here's a screenshot of the first welcome page on my laptop. All 3 options have "Ad and Tracker Blocker" checked, but it turns out that the ad and tracker blocker is actually disabled!
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@PinkAshes2
@adamant_im
I'm focused on browsers for now, but investigating messengers would be a fascinating project!
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Here's a new interview with me by
@techloreistaken
regarding PrivacyTests.
We discuss how I started the site, how the tests work and lots more!
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The Global Privacy Control (
@globalprivctrl
) is a signal that web browsers can send to pages they visit to request that users' data not be sold or shared.
Among Android browsers I tested, only
@Brave
and
@DuckDuckGo
send the GPC signal by default.
🧵
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Another option in Firefox is to install the uBlock Origin extension. uBlock Origin comprehensively blocks the tracking content I tested in Firefox:
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