Is Download Manager (S3) safe?

Low risk

Download Manager (S3) modifies Content-Security-Policy headers on every page and can send downloaded file hashes to VirusTotal.

The extension intercepts HTTP and HTTPS responses across all sites and rewrites Content-Security-Policy headers to append 'data:' to the img-src directive, removing that restriction site-wide. When the auto-scan option is enabled, it reads each completed download from disk, computes a SHA-256 hash, and transmits that hash to VirusTotal to check for known malware.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

Oleksandrv5.12Firefox Add-ons
20Risk

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

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Data recipients

www.virustotal.com
Updated 17 September 2026amo-477770