I would like to disable some built in hotkeys: for switching to the previous and next tabs (Ctrl+PgUp and Ctrl+PgDn), I want to rebind them to F6 and F7; for closing the current tab (Ctrl+W), I want to rebind it to F4; for duplicating the current tab (Ctrl+Shift+T), I want to rebind it to F8. I've learned that you can do this by using autoconfig from [https://support.mozilla.org/mk/questions/1439304 here] , but I don't know how to specifically setup the autoconfig file to find the right keyconfigs. Does anybody have a solution for this?