disable check browers,

hi i wish to create file configure (users.js), i will add lines for my choose, and i create file sh (bash command) for installing new user (login Lightdm) example user: kiosk-01, autostart to firefox -kiosk file:///index.html this is works but i need add new configure for new user of firefox and new user login lightdm. file users.js : where i will install? maybe /usr/lib64/firefox/browser/defaults/preferences/ (here file)? or overwrite to file firefox.js or other solution? other thing: i will write here the list of preferences for disable stuffs for kiosk, example: disable check browers, disable all warn for quit, new tabs, etc etc.. later i will write the list for KIOSK ok? for now how i add new configuration for new firefox profile for new user login.. thank you