Hi, I need to disable the Ctrl-t, Ctrl-n, Ctrl-l, Ctrl-w and Ctrl-q shortcuts that manages the tabs and windows creation and closing. I have seen here (https://support.mozilla.org/en-US/questions/1262659) that the keyboard shortcuts can be caught and prevented to act using a javascript in the webpage. But this solution does not block the window/app related shortcuts as listed above. This configuration can either be done with JS on the webpage or at installation time (configuration file, command line) but no interactive setup... Can one help on this matter? This question is also related to the kiosk set up of firefox. I wish infine to have a webpage that seems like an app. Here (https://superuser.com/questions/1451297/firefox-in-an-app-mode) one can find a way to hide the nav-bar and the tool-bar. Firefox will run on an Ubuntu machine 18.04.