Is YouTube Video and Audio Downloader (WebEx) safe?

Medium risk

The extension downloads binaries from third-party GitHub repos without integrity verification and installs them via native messaging.

The extension downloads a native messaging host binary from the andy-portmen/native-client GitHub repository and an ffmpeg binary from the inbasic/ffmpeg GitHub repository. Neither download is verified with a hash or signature; the extension uses whatever URL the GitHub releases API returns. Once downloaded, the ffmpeg binary is placed in the user's home directory with execute permissions via a native messaging exec command.

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

fellerv1.2.1Firefox Add-ons
45Risk

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

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Data recipients

api.github.com
Updated 17 September 2026amo-810604