Can't Edit FireDragon Pref.js

Hi there,
I've used LibreWolf before and was able to edit the prefs.js to configure the browser but when using FireDragon I edit the prefs.js and none of the changed show up in the about:config menu. Could someone help me? I'd like to change a few of the settings but am unable to. Sorry I'm a newbie

I'm on the mobile in this moment and can't check, but if you open about:config on the browser isn't there a kind of show all toggle on the top?

Additionally, I see in the Firedragon post:
Support for own settings using ~/.firedragon/firedragon.overrides.cfg - use this to override default settings shipped in /usr/lib/firedragon/firedragon.cfg