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LinkedIn Hidden Code Secretly Searches Your Browser for Installed Extensions
(cybersecuritynews.com)
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this post was submitted on 09 Apr 2026
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It is absolutely a secret! Based on the discussions I've seen, many people in the field were quite surprised that this technique works. So just like Meta's recent-ish WebRTC scandal, this was a secret, even if the code always showed what it does.
It is? How are these websites detecting my Firefox extensions?
By doing things the extensions are interacting with. You can see if an ad is served and displayed or not, you can detect if an iteraction was originated by an user or automatic, you can see if letters were pasted or input at a speed no human can match.