isdtor wrote: > > It seems that firefox 68.x, as distributed with CentOS6 updates, no longer allows opening jnlp files with javaws > > The "Choose Helper Application" window popping up after selecting "Open with/Other" has a predefined list of applications that cannot be customised. > > I'm sure it must be a configuration issue as this works fine with the same browser on other distributions, but what to look for? > > # alternatives --display javaws > javaws - status is auto. > link currently points to /usr/java/latest/jre/bin/javaws > /usr/java/latest/jre/bin/javaws - priority 200000 > Current `best' version is /usr/java/latest/jre/bin/javaws. > # ll -L /etc/alternatives/javaws > -rwxr-xr-x 1 root root 140296 Dec 15 2018 /etc/alternatives/javaws > # Don't know about CentOS6, but with CentOS7, the selection of apps that you can use appear to map to '.desktop' files? If it is the same on CentOS6, then you might be able to set up a suitable .desktop file (e.g. in /usr/share/applications/ or similar) to do what you want ... No idea if this is of any help James Pearson