I know you can change to Dark Theme, Light Theme or Firebug in Firefox Quantum. But I have it on Dark theme but don't like the color theme syntax of that theme. Is there a way to change it to Monokai or Material color scheme?
Thanks
As far as I know there is no built-in option to add theme to Firefox dev tools (as of FF57), but you can change the style of Firefox dev tools using Browser Toolbox and userChrome.css.
Check my step by step answer at Change columns size in Firefox Developer Tools.