in firefox browser I scan from a hp8500 all-in one printer to my windows 7 documents file. When i go to open a document file in firefox library (after it was scanned) I can not open the downloaded file. The download arrow completes I click to open the file and it won't open. All of my previous documents file in Adobe is now Firefox library. I just want to open my files and read them. my back up is dropbox. Please help me thanks, Lee