Firefox Profile Folder Contents

Why can't I see the contents in my Profile Folder when it says I have 144 megs in it? This started when I upgraded Firefox. MacBook Pro OS 10.6.8 Firefox 19.0

I even tried creating a new folder, then copied and pasted contents that I can't see in Profile Folder into the new folder but selecting all, command C, command V. Then I went to the new folder and the info is telling me there are still 144 mb in that new folder but I still can't see the contents. How can I see the contents again. Is there an easy fix from someone who isn't an expert with computers? Any help is greatly appreciated.