this post was submitted on 03 Jun 2025
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Tracking code that Meta and Russia-based Yandex embed into millions of websites is de-anonymizing visitors by abusing legitimate Internet protocols, causing Chrome and other browsers to surreptitiously send unique identifiers to native apps installed on a device, researchers have discovered. Google says it's investigating the abuse, which allows Meta and Yandex to convert ephemeral web identifiers into persistent mobile app user identities.

The covert tracking—implemented in the Meta Pixel and Yandex Metrica trackers—allows Meta and Yandex to bypass core security and privacy protections provided by both the Android operating system and browsers that run on it. Android sandboxing, for instance, isolates processes to prevent them from interacting with the OS and any other app installed on the device, cutting off access to sensitive data or privileged system resources. Defenses such as state partitioning and storage partitioning, which are built into all major browsers, store site cookies and other data associated with a website in containers that are unique to every top-level website domain to ensure they're off-limits for every other site.

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[–] [email protected] 3 points 1 day ago* (last edited 1 day ago)

Does anyone know if there's additional sandboxing of local ports happening for apps running in Private Space?

E: Checked myself. Can access servers in Private Space from non-Private Space browsers and vice versa. So Facebook installed in Private Space is no bueno. Even if the time to transfer data is limited since Private Space is running for short periods of time, it's likely enough to pass a token while browsing some sites.

[–] [email protected] 5 points 3 days ago* (last edited 2 days ago)

Not surprising, it's always expected from tech corporations, where at the end of the day it's profit and favor with conservative politicians. If they're not trying to use information gathered on people to bad government looking to cut costs ("saving taxpayers' money") by removing minority beneficiaries, they love to shove content you don't even want.

Why I never use my real name online.

[–] [email protected] 5 points 3 days ago

laughs in adguard

[–] [email protected] 38 points 3 days ago (1 children)

Meta should be broken up and its leadership barred from working in tech (or politics)

[–] [email protected] 10 points 3 days ago* (last edited 3 days ago)

and its leadership barred ~~from working in tech (or politics)~~

[–] [email protected] -3 points 3 days ago

Its russian, i've never used it and never will. Surprised so many 🏴‍☠️'s advocated for it..

[–] [email protected] 18 points 3 days ago (1 children)

De-anonymising Yandex

Me: Ha! Good thing I am not Russian!

De-anonymising Meta

Me: Damn..and it is hard for me to let go because my social circle use Meta-owned social media and couldn't care less about privacy....I am toast...

[–] [email protected] 15 points 3 days ago

I used to be in your situation and one day I just told everyone I was leaving and if they want to contact me they would have to use Signal. You can't change most people's minds and Meta knows it, that's how they keep their monopoly

[–] [email protected] 0 points 3 days ago

Phew, glad i dodged that bullet by buying an iphone. (/s)

[–] [email protected] 21 points 3 days ago* (last edited 3 days ago) (2 children)

We found that browsers such as Chrome, Firefox and Edge are susceptible to this form of browsing history leakage in both default and private browsing modes. Brave browser was unaffected by this issue due to their blocklist and the blocking of requests to the localhost; and DuckDuckGo was only minimally affected due to missing domains in their blocklist.

Aside from having uBlock Origin and not having any Meta/Yandex apps installed, anyone aware of additional Firefox settings that could help shut this nonsense down?

[–] [email protected] 4 points 3 days ago* (last edited 3 days ago) (1 children)

I feel like that's all you need. You don't have their apps installed, so the problem is already solved. If you use uBlock Origin to block their trackers, the problem is solved. So you've solved it twice.

[–] [email protected] 1 points 3 days ago

Yes and no, I've treated the symptoms, but not the problem. All it takes is a trillion dollar company buying a new domain every once in a while to foil uBlock, and now that it's more known, anyone can create an an app that opens ports and listens for trackers.

Would love it if Firefox would let me block all requests to localhost.

[–] [email protected] 9 points 3 days ago (1 children)

I know that people here generally like to shit on Brave, but it seems that the claim "Privacy by default" has held up in this context.

[–] [email protected] 1 points 3 days ago

Isn't that Proton's tagline?

[–] [email protected] 1 points 3 days ago* (last edited 3 days ago) (1 children)

Consider getting a modern Pixel w/GrapheneOS!

  • Slaps his lap.

It has the Vanadium.

[–] [email protected] 3 points 3 days ago* (last edited 3 days ago) (2 children)

Are you suggesting something like LineageOS is a better choice?

(Seriously asking: I've got a new-to-me Pixel that I'm looking to switch to a degoogled-ish ROM on, and Graphene and Lineage were the two front-runners.)

[–] [email protected] 3 points 3 days ago* (last edited 3 days ago)

If it's a Pixel anyway, GrapheneOS has a few nice security and privacy features that LineageOS doesn't have (yet?).

I think both are pretty great and much better than most alternates.

[–] [email protected] 5 points 3 days ago* (last edited 3 days ago)

I'm running Graphene and I'm very happy with it.

[–] [email protected] 4 points 3 days ago (2 children)

Block all tracking scripts and use Firefox Nightly with ublock when possible.

[–] [email protected] 5 points 3 days ago (1 children)

Using such a unique browser version is very de-anonymizing.

[–] [email protected] 1 points 3 days ago (1 children)

Could add a user agent spoof?

[–] [email protected] 3 points 3 days ago (1 children)

Even then, most tracking is done through fingerprinting.

[–] [email protected] 2 points 3 days ago* (last edited 3 days ago) (1 children)

Yeah it makes me laugh when people talk about "don't use cookies" or "block ads" like companies didn't switch to more advanced techniques (like hell, I saw a paper where they could fingerprint you just simply by how you interact with the webpage) 15 years ago.

There is no way to use the modern web without getting fingerprinted.

[–] [email protected] 2 points 3 days ago (1 children)

Well “block ads” is also shorthand for “block as many 3rd-party requests as possible while maintaining the desired content” which absolutely improves your privacy and prevents a lot of fingerprinting scripts from ever loading.

[–] [email protected] 3 points 3 days ago (1 children)

That's the thing though, websites have gone away from "fingerprinting scripts" and have started finger printing you by what you serve, how and when you access it, and other things that they can all collect purely on the server side. The rest is just for advertising and data collection for improvements.

[–] [email protected] 2 points 3 days ago

All of this is far easier to subvert than tracking scripts (and cookies and port scans) which literally as evidenced by the article in the OP are not techniques that companies have "gone away" from at all, at least not by entirely replacing them.

[–] [email protected] 11 points 3 days ago (1 children)

Not sure about the "nightly" part (as opposed to beta or stable), but yes.

[–] [email protected] 2 points 3 days ago (1 children)

I prefer nightly because about:config is accessible unlike on the mainline version. Does Beta also allow that?

[–] [email protected] 2 points 3 days ago

Beta does and unlike nightly doesn't update every night.

There's also Fennec on fdroid if you need something stable with about:config support.

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