It has nothing to do with belief, just seeking the facts.
A simple answer rather than avoiding it would have concluded this topic some time ago.
I don't know what is so secret about telling us the name of the malware detection, if it were a PUP and you had set your Quick or Full scans to look for PUPs then this whole thing could have been answered 'accurately.' Without answers to questions how can we help.
If considered a PUP in the detection, it would explain why two of us don't get the alert as we aren't looking for PUPs. Since fasterfox seeks to optimise/tweak/modify firefox then it is entirely possible for it to be considered a PUP.
But when you don't answer questions how can we get to the bottom of your question, we are trying to help but it seems you don't want it.
So I'm done wasting my time on this topic.