Hello again!
This is something I never have experienced before. Inside the graphical environment I cant install anything. Not ondemand and neither onboot. I made a test when I made a reinstall. I put ffirefox among the ones to be installed from cli with tce-load -wi etc. Firefox installed and I am using it now. If anyone has an idea how to resolve this I will be very grateful.
Kind greetings,
meo