alternative

[mandeeps708]

I use something like:

bindsym Ctrl+q exec /bin/false

to disable it systemwide.

And for being able to kill other applications, one may use bindsym $mod+Shift+q kill

[sasawat]

I actually like using Ctrl+Q most of the time, just not in FireFox

[raphapr]

bindsym Ctrl+q exec nop

could be a option