У вашего броузера проблема в совместимости с HTML5
Part 3: Advanced Settings
1) open file with custom application
( https://ubuntuincident.wordpress.com/2010/12/08/configure-mc-open-files/ )
cd ~/.config/mc
cp /etc/mc/mc.ext .
ln -s mc.ext bindings
2) go to parent directory with Backspace
( https://ubuntuincident.wordpress.com/2014/11/16/midnight-commander-go-to-parent-directory-with-backspace/ )
cd ~/.config/mc
cp /etc/mc/mc.keymap .
# new value:
CdParentSmart = backspace