We upgraded to latest Firefox version and noticed that jnlp files that used to download and open automatically doesn't work as expected. We know there is a new logic about download/open files in this Firefox version, but why the jnlp files are automatically downloaded but the file downloaded doesn't have any extension, then it cannot be opened with the associated program (javaws)?

The file is named frmservlet.jnlp and Firefox warns about that file extension, however once is downloaded it's named as frmservlet (no extension).