>
> Why do you do S-C-x in Firefox? Are you using some add-on that gives
> you Emacs bindings there, or?
>
>
no you misunderstood me, I want to avoid to learn any new emacs keybindings
that have a very different meaning in other applications.

e.g C-w closes a tab in FF, thats why I want to restrict me to always use
C-x for cutting, otherwise I have restore FF-Windows 10 times per day.

Actually emacs keybindings are mentioned in the FF docs - something about
activating them in Gnome would also activate them in FF. But I couldn't
figure out how.