OS: Debian Jessie Firefox version: 43.0 - 64 bit I am trying to upload some pics on my Facebook account using Firefox. When I click on Facebook's file upload icon, Firefox bring up a 'File Upload' window. I noticed that smaller image file is previewed on the right side, while bigger image file is not. Is there anyway I can change this behavior or maybe change what Firefox is using to browse my files? Thanks, Roberto Fulgado