(It would be fairly easy to articulate that of you were home, the intruder would have believed someone was home, and therefore making the intrusion a felony, and thus a citizens arrest would be lawful)
To a rational being yes it is a felony. HOWEVER, better read the law again. It doesn't say that you are justified if the crime is a felony, it says you are justified if the person is CONVICTED of a felony!! There is miles of difference between the two. Most cases end in a plea bargain and it is VERY COMMON for a felony charge to be dropped to a misdemeanor in the plea bargain. If so, the citizen making the "citizen's arrest" is left out to hang, as that law will NOT protect them. You have better odds playing the lottery than playing that card.