I have been searching and could not found a way to access my firebox browser. I am able to update my software, I can ping IP external website both with IP and DNS. Every-time I try to open Firefox, I keep getting an an error message "failed to exe default web browser", see attachment. I am using xubuntu-18.04-desktop-i386.
I have a physical connection to the my internet. I also installed Chromium, but it would not open. Thoughts?