In order to handle downloading PDF files, I have the option set to 'Always Ask' under Firefox Preferences > General > Applications > PDF. However, when the dialog opens, if I chose 'Open With Firefox', the file is automatically getting downloaded to '/Users/<UserName>/Downloads/' directory. Can I instead change this location to some temporary directory, so that I don't have all the files opened within Firefox to be downloaded to 'Downloads' directory requiring additional management.