What our analysis found

Dualsub, used by 100,000 people, showed no malicious code in Extension Auditor's review. It comes from a trusted publisher and was last updated in July 2026.

The extension's behavior is fully consistent with its stated purpose of translating and displaying dual subtitles on video sites. It communicates only with its own API () for translation services, which is first‑party and necessary for the core functionality. No data is collected without user consent, and no unauthorized permissions or covert data flows were found. A minor mismatch in web_accessible_resources (published vs. bundled) is likely a listing error, not malicious.