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Chrome extensions spying on users' browsing data

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Re: Chrome extensions spying on users' browsing data

#21
Over 15 years ago now, I had a popular chrome extension that did a very specific thing. I sold it for a few thousand bucks and moved on. It seemed a bit strange at the time, and I was very cautious in the sale, but sold it and moved on.

It's abundantly obvious to me now that bad actors are purchasing legitimate chrome extensions to add this functionality and earn money off the user's data (or even worse). I have seen multiple reports of this pattern.

Re: Chrome extensions spying on users' browsing data

#22

This is why I only run open source extensions that I can actually audit. uBlock Origin, SponsorBlock, the kind of tools where the code is available and the developer isn't anonymous. The Chrome Web Store is basically unregulated and Google doesn't care as long as they get their cut. Open source at least gives you a chance to see what you're installing before it starts exfiltrating your data to some server in a countr…

How do you check that the open sourced code is the same one that you are installing from the extension repository and actually running?

This kind of nihilistic comment doesn’t do anything for me.

There’s always a possibility of problems along the chain. You are reducing your risk not eliminating it.

Re: Chrome extensions spying on users' browsing data

#23

This is why I only run open source extensions that I can actually audit. uBlock Origin, SponsorBlock, the kind of tools where the code is available and the developer isn't anonymous. The Chrome Web Store is basically unregulated and Google doesn't care as long as they get their cut. Open source at least gives you a chance to see what you're installing before it starts exfiltrating your data to some server in a countr…

An extension from a trusted, non anonymous developer which is released as open source is a good signal that the extension can be trusted. But keep in mind that distribution channels for browser extensions, similarly to distribution channels for most other open source packages (pip, npm, rpm), do not provide any guarantee that the package you install and run is actually build verbatim from the code which is open sourced.

Re: Chrome extensions spying on users' browsing data

#25

This is why I only run open source extensions that I can actually audit. uBlock Origin, SponsorBlock, the kind of tools where the code is available and the developer isn't anonymous. The Chrome Web Store is basically unregulated and Google doesn't care as long as they get their cut. Open source at least gives you a chance to see what you're installing before it starts exfiltrating your data to some server in a countr…

How do you check that the open sourced code is the same one that you are installing from the extension repository and actually running?

I agree but let me play the devil's advocate. I'll channel Stallman:

Same argument can be applied to all closed source software.

In the end its about who you trust and who needs to be verified and that is relative, subjective, and contextual... always.

So unless you can read the source code and compile yourself on a system you built on an OS you also built from source on a machine built before server management backdoors were built into every server... you are putting your trust somewhere and you cannot really validate it beyond wider public percetptions.

Re: Chrome extensions spying on users' browsing data

#26
post #17

Earlier quoted context omitted.

I have published an extension [1] that has 100k+ users and I've probably received hundreds of emails over the years asking me to sell out in one way or another. It's honestly relentless. For that reason I also only trust uBlock Origin, Bitwarden and my own extensions. I'd also note that all this spam is via the public email address you're forced to add to your extension listing by Google. I don't think I've ever had…

Just curious how much does it sell? It gives an idea about how much my personal data is worth

I was just having a quick search and the only email I can find that offered a price range up front was for $0.1-0.4 per user, and that was from 2023. So I assume up to a dollar per user these days?

Re: Chrome extensions spying on users' browsing data

#27
post #17

Earlier quoted context omitted.

Just curious how much does it sell? It gives an idea about how much my personal data is worth

I was just having a quick search and the only email I can find that offered a price range up front was for $0.1-0.4 per user, and that was from 2023. So I assume up to a dollar per user these days?

I imagine it must be very tempting to take that bag while old reddit is still usable.

Thank you for not doing so.

Re: Chrome extensions spying on users' browsing data

#28

This is why I only run open source extensions that I can actually audit. uBlock Origin, SponsorBlock, the kind of tools where the code is available and the developer isn't anonymous. The Chrome Web Store is basically unregulated and Google doesn't care as long as they get their cut. Open source at least gives you a chance to see what you're installing before it starts exfiltrating your data to some server in a countr…

How do you check that the open sourced code is the same one that you are installing from the extension repository and actually running?

> How do you check that the open sourced code is the same one that you are installing from the extension repository and actually running?

Extensions are local files on disk. After installing it, you can audit it locally.

I don't know about all operating systems but on Linux they are stored as .xpi files which are zip files. You can unzip it.

On my machine they are installed to $HOME/.mozilla/firefox/52xz2p7e.default-release/extensions but I think that string in the middle could be different for everyone.

Diffing it vs what's released in its open source repo would be a quick way to see if anything has been adjusted.

Re: Chrome extensions spying on users' browsing data

#29
post #5

Hopefully people will start learning that you want to install as few browser extensions as possible.

My honest reaction to your comment is "What? No!".

I want to block ads, block trackers, auto-deny tracking, download videos, customize websites, keep videos playing in the background, change all instances of "car" to "cat" [1], and a whole bunch of weird stuff that probably shouldn't be included in the browser by default. Just because the browser extension system is broken it doesn't mean that extensions themselves are a problem - if anything, I wish people would install more extensions, not less.

[1] https://xkcd.com/1288/

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