this post was submitted on 20 Nov 2023
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[–] [email protected] 106 points 11 months ago* (last edited 11 months ago) (3 children)

You absolutely can tell what's happening by reading the source code. They are using a listener and a delay for when ontimeupdate promise is not met, which timeouts the entire connection for 5 full seconds.

https://pastebin.com/TqjzbqQE

[–] [email protected] 17 points 11 months ago (1 children)

I'm sorry but I don't see how that check is browser-specific. Is that part happening on the browser side?

[–] [email protected] 29 points 11 months ago (3 children)

They don't need to put incriminating "if Firefox" statements in their code -- the initial page request would have included the user agent and it would be trivial to serve different JavaScript based on what it said.

[–] [email protected] 26 points 11 months ago (1 children)

Easy enough to test though. Load the page with a UA changer and see if it still shows up when Firefox pretends to be Chrome

[–] [email protected] 28 points 11 months ago* (last edited 11 months ago) (1 children)

The video in the linked article does just that. The page takes 5 seconds to load the video, the user changes the UA, they refresh the page and suddenly the video loads instantly. I would have liked to see them change the UA back to Firefox to prove it's not some weird caching issue though

[–] [email protected] 6 points 11 months ago

Yeah, and also Edge or an older version of Chrome etc just to be sure.

[–] [email protected] 8 points 11 months ago

I guess his question is "is that happening?"

[–] [email protected] 9 points 11 months ago

Well, at least I learned that javascript understands exponential notation. I never even bothered to try that lol

[–] [email protected] 2 points 11 months ago

Can I have ublock block that? It seems simple enough to extract that code out.