kuber.studio
Security and privacy
browser fingerprinting demo
SHOW HN2026
How HN took it
4 positive, 1 neutral or asking, 0 mixed, 14 critical, out of 19 comments about the project. Thread score -0.43.
Execution: 1 for, 10 againstPrivacy: 1 for, 3 againstIdea: 2 for, 1 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Clever technical demo of cookieless tracking
From 3 comments
This is such a clever technical demo. Do you work for Posthog? LOL
cvince on HNGood demo of the gap between "no cookies" and "no tracking". A chunk of the analytics industry sells "cookieless" where under the hood it's exactly this - a fingerprint doing the…
yev76 on HNExcellent! Thanks! It got me thinking, is there any way people can defend from this privacy abuse?
olek1983 on HN
Shows the gap between no cookies and no tracking
From 1 comment
Good demo of the gap between "no cookies" and "no tracking". A chunk of the analytics industry sells "cookieless" where under the hood it's exactly this - a fingerprint doing the…
yev76 on HN
Objections
Many reported details are wrong (CPU, display resolution, OS, timezone, battery)
From 5 comments
> "Your CPU is ARM-family — we know from a single subtraction" Not sure what went wrong for you but I'm running an i9 > "Your battery is at 100%" I don't think my desktop…
voidUpdate on HNFun site, but it got some things wrong: - 8 core cpu. I have 24. - devtools open. they are not. - primary language. this one is strange, because I'd think the browser declares it…
eisleggje on HN> Nice machine, by the way. an Apple M1. > 2 CPU cores and a 1920×1200 display. All the bells and whistles. i'm actually using a macbook neo and my display resolution is not…
znpy on HNTZ wrong. Screen resolution wrong. 3200x2200? How does it come up with that?
LargoLasskhyfv on HNI was surprised that it only detected very basic details about me.. and most importantly, it got the display resolution completely wrong!
pkphilip on HN
Linux and Windows detection conflicts; OS guesses are inaccurate
From 3 comments
> What you are using it on > > Your display scaling is set to 150%. > A fractional device pixel ratio (1.5) only comes from Windows display scaling. macOS uses whole-number…
madiling on HNJust tested this. > Your User-Agent says Windows, but your installed fonts are Linux's. One of those is lying, and it isn't the fonts. But also... > Voice list = Microsoft David…
zinekeller on HNSame issue here. Pixel ratio 1.25 on Linux, Firefox.
dolmen on HN
Claims of zero permissions are inaccurate; it requests DRM, WebGL and canvas access
From 3 comments
> It asked for zero permissions. Not quite. It requested to play DRM protected content.
Clamchop on HNAnd asked to create a WebGL context and to view canvas data. Closed and reopened the browser and revisited the site a couple times, and it thought it was my first and gave me a…
hotsalad on HNFun site, but it got some things wrong: - 8 core cpu. I have 24. - devtools open. they are not. - primary language. this one is strange, because I'd think the browser declares it…
eisleggje on HN
Fingerprint changes between visits, so 'returning visitor' detection is unreliable
From 3 comments
And asked to create a WebGL context and to view canvas data. Closed and reopened the browser and revisited the site a couple times, and it thought it was my first and gave me a…
hotsalad on HNFun site, but it got some things wrong: - 8 core cpu. I have 24. - devtools open. they are not. - primary language. this one is strange, because I'd think the browser declares it…
eisleggje on HNI tried it in different browsers. WebRTC must always be disabled. It’s better to try to work without JS in the browser. Also, the “forget” button worked for one reboot, and then…
user205738 on HN
Requests
Fix inaccurate detections such as OS, CPU and display resolution
From 3 comments
LMAO will patch
kuberwastaken on HNPerks of making this deterministic haha will fix, thank you
kuberwastaken on HNTested on MacOS, but will try to patch this
kuberwastaken on HN
Make fingerprint results deterministic
From 1 comment
Perks of making this deterministic haha will fix, thank you
kuberwastaken on HN
Explain how defenses against fingerprinting can work
From 1 comment
Excellent! Thanks! It got me thinking, is there any way people can defend from this privacy abuse?
olek1983 on HN
Questions
How can people defend against this kind of fingerprinting?
From 1 comment
Excellent! Thanks! It got me thinking, is there any way people can defend from this privacy abuse?
olek1983 on HN
How does it derive certain values such as resolution?
From 1 comment
TZ wrong. Screen resolution wrong. 3200x2200? How does it come up with that?
LargoLasskhyfv on HN