Is Free Download Manager official extension safe?

Clean risk

Free Download Manager captures HTTP headers and cookies for all browsed URLs and sends them to the local FDM app via native messaging.

The extension intercepts all outgoing and incoming web request headers across every site visited, including Cookie headers, and transmits them to the FDM native host (org.freedownloadmanager.fdm5.cnh) running on the user's machine. When a download is detected, it also collects all cookies for that URL and passes them to FDM to authenticate the download on the desktop side. A one-time install check reads open tab URLs and up to three recent history entries to determine how the extension was installed, but this data is not transmitted remotely.

freedownloadmanager.orgv3.3.2Firefox Add-ons
0Risk

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

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Data recipients

org.freedownloadmanager.fdm5.cnh (local native host)
Updated 17 September 2026amo-965677