🌐 Frontend & Web

Live Trojans Lurk in Firefox Extensions: My Python Scanner Exposes the Threat

Firefox extensions promised safety over Chrome's Wild West. A homebrew Python scanner just shattered that illusion—uncovering live trojans stealing passwords and running remote commands.

theAIcatchup Apr 10, 2026 4 min read
Screenshot of Python script scanning malicious Firefox .xpi extension revealing trojan code

⚡ Key Takeaways

  • Live malware like YTMP4 trojan still infects Firefox add-ons site, stealing passwords via C2 servers. 𝕏
  • Python .xpi scanner uses static analysis and emulation to expose hidden threats in YouTube extensions. 𝕏
  • Mozilla must evolve reviews; history shows malware adapts faster than curators. 𝕏
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#browser security #firefox extension malware #firefox extensions #malware scanner #python malware detector #python scanner #python script #xpi malware #xpi scanner

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Originally reported by dev.to

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