I did a search for what I am certain has been asked thousands of times and came up with blanks. My two button mouse with scoll thingy on top is not able to scroll up using Firefox or Safari. I've tried setting preferences and utility but nothing will allow me to fix the inability to scroll up. It appears to be a model A1152. Again, I have searched on "Mouse" and "Scroll" and combinations and i come up with hundreds of threads that have nothing to do with either.