this post was submitted on 04 Mar 2026
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Web Development

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I tested what happens when you paste code into popular online developer tools. Some sites contact 96 external domains, set 540 cookies, and run real-time ad auctions on your data. Here is everything I found.

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[–] Kissaki@programming.dev 2 points 16 hours ago

That /unsaved/{id} path with a unique server-assigned identifier means your diff content was transmitted to and stored on their servers.

Not necessarily. URLs can be changed client-side, within the browser, through JavaScript. The fact that the URL changed to unsaved alone is no proof. It could very well be browser-local, labeled unsaved and held in session store for example, ready to be saved.

With the other indications, you can of course make a guess and/or consider it a strong indication.

It should be pretty obvious/observable when observing interaction and network requests within the browser. A network request with the content as body would be much better proof.