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Is nico downloader safe?

This security report analyses whether nico downloader is safe to install on your browser. We check nico downloader for malicious behaviour, data exfiltration, suspicious permissions, and known vulnerabilities so you can decide if nico downloader is safe for your personal or enterprise fleet.

Low risk

Legitimate video downloader for Nicovideo (Japanese video platform). Uses FFmpeg WASM for video processing within content scripts. Minimal permissions, no data transmission to third parties.

v5.0.0.20Chrome Web Store
0Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Updated 10 April 2026dncjcadpoakefjpnabimpalenliehbig

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