[cremno]

That article ends with a link to https://wiki.mozilla.org/Security/Features/Application_Reput... which contains:

>These lookups are Windows-only, because we rely on signature information in order to suppress remote lookups and signature APIs are only available on Windows. If the binary is unsigned or its signature does not match a known good publisher and the filename ends in a known executable extension, Firefox sends a remote lookup to the application reputation service.

This is more precise than your post including the quote.