For some reason the top_LibFredo6 is listed as a separate extension and is unsigned, with no version of user info.
This generates the message if the Loading Policy is not Unrestricted...
I'm not sure why this top_LibFredo6 entry appears - can it not be avoided ?
I don't see its entry in the extensions list when using older versions of LibFredo ??
Here are current entry PNGs...
LibFredo-signed.PNG
Top_unsigned.PNG