> how can i check the shortcut (default) ?
> e.g. [browser : www] does not work but [browser : firefox] does ; btw why
> have i 2 versions : firefox & firefox-esr ?
> & crtl+alt+t does not start the terminal but [run command prompt : alt+f2]
In Gnome, try going to Settings > Keyboard: scroll down to Custom
Shortcuts and add them there. To launch a terminal I use the Command
"gnome-terminal". Firefox probably similar.
> - do you know a command or a soft doing the job just for testing the
> validity of these debian settings (default) ?