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Is Japanese IO safe?

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

Medium risk

Analysis of the Japanese IO Chrome extension identified 1 verified vulnerability and 1 informational finding. The verified vulnerability involves the onExternalMessageReceived handler accepting unauthenticated commands from externally connectable pages, including localhost.

v0.14.1Chrome Web Store
45Risk

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

Publishers can request a review.

Updated 10 April 2026dccefjeoofjkdjodbkkbncjcipagdnad

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