[applfanboysbgon]

> Meta must face a lawsuit alleging that it secretly tracked Android users' browsing activity on mobile websites that embedded Meta's analytics pixel, and linked that activity to users' identities, a federal judge ruled Monday.

> The decision, issued by U.S. District Court Judge Rita Lin in San Francisco, grew out of a class-action complaint initially brought last June by California resident Devin Rose (and later joined by other Android users).

> Rose alleged that between September 2024 and June 2025, Meta exploited Android's localhost -- a feature that allows software developers to test applications -- to connect users’ mobile web browsing to their Facebook and Instagram profiles.

May 12, 2026

[Retr0id]

Not at all to defend Meta but "a feature that allows software developers to test applications" is a dubious definition of localhost. I also can't come up with a better one.

[furyofantares]

It's not a definition, but it is an accurate statement.

[Retr0id]

It's a true statement but I'm not sure it gives a good impression of what localhost actually is.

[rambojohnson]

If the biggest issue you found in the article is the localhost gloss, Meta probably got off easy.

[Retr0id]

I never said that.

[austin-cheney]

Here is the explicit definition of localhost.

The term "localhost" refers to the default entry in all modern operating system host files. By default modern operating systems provide a hosts file that provides domain name resolution without reliance upon the Domain Name System (DNS) protocol. By default these host files typically ship with one entry, a domain named "localhost" that points to IPv4 loopback interface 127.0.0.1.

[FuckButtons]

Sure, but you lost the non technical audience by the end of the first sentence.

[austin-cheney]

Then what are we talking about? If this is only about comfort of people who don't give a shit anyways then just relate it to money or cartoons or whatever and walk away. It just doesn't matter.

[cwmoore]

The only audience qualified to make technical decisions.

[iririririr]

specially for this case, the localhost part is misleading.

what should have been the focus was "starting a shadow server on the use device, wide open for any application or webpage"

[ChrisRR]

Yes I was totally confused as that's not what I understood by localhost

[istumbler]

“A network interface which allows processes on the same internet host to communicate without the need for a network connection”

[Retr0id]

There's a lot of layperson-unfriendly words in there! Iterating on that:

"A feature that allows multiple programs on the same device to communicate without the need for an internet connection"

[thewebguyd]

Some concepts just can't (or shouldn't) be broken down to the level of lay person friendly though. There are just some technical concepts that have a complexity floor that if you drop below you are no longer explaining the actual concept but a fantasy.

For a judge trying to rule on a technical case, a poor layperson analogy and lead to a confidently wrong legal conclusion that has serious negative consequences. Thats why court appointed neutral experts are important.

[d1sxeyes]

A way for computer programs to talk to each other on the same device as though they were running on different devices connected over a network.

I agree with you by the way, I just don’t think this is one of those cases.

[ryandrake]

Computer talky no pluggy

[FergusArgyll]

a pty fits that definition though

[dnnddidiej]

It is like having a pool room at home instead of playing at the bar. Facebook want to snoop around your pool room.

[Velocifyer]

“A loopback network interface” or “A interface that refers to the same host”.

[SturgeonsLaw]

"on the device itself"

[thephyber]

Localhost is “on the device itself”, but so is an installed App and files and user settings.

This is also missing a lot of what localhost means in this context (networking, violation of the usually way similar apps and websites work on an Android device, etc).

[gruez]

docket: https://www.courtlistener.com/docket/70448987/in-re-meta-and...

[Obscurity4340]

> Judge RitaLin

[htx80nerd]

im failing to see the connection

>standard pixel tracking, linked to meta (js , web)

>Meta exploited Android's localhost (os level)

[netsharc]

- Instagram/Facebook app listening on localhost port X.

- A website running JS on the browser tries to connect to localhost port X. If it succeeds it's now talking to Zuck's app.

- The JS can report whatever it wants to the app, and the app knows the identity of the browsing user, because ~100% of the time it's the user also logged into the app(s).