I tried to setup the following URL as VFS: https://oceandata.sci.gsfc.nasa.gov/
With the RC3 installation I'm able to select the VFS in the FileChooser.
the top-level directories are shown correct
but when I want to step into one of them I get a FileChooser with strange entries.
On the master branch (last update 13.06 13:51) I get an exception instead after the configuration and after restarting SNAP. The VFS is not shown in the FileChooser.