Just received message, by LIFEHACKER, originally discovered by LAYER X, about "17 malicious extensions across numerous browsers", the list which includes Firefox and is supposedly a recent event outside of the earlier (?) event involving the Malware Ghost Poster in downloads previously cleansed by Firefox. Is this old news or is there more Malware that is 'out there' or that could be on my computer without my knowledge? (I do not download willy-nilly....) Would appreciate valid insight if it is just repetitious/old info rehashed for shock value. Thanks!