Customize Firefox Developer dev tools color theme

Just as title says, I'd like to know if it's possible to change the color theme of Firefox Developer dev tools. Light and dark theme are nice, but I'd like to use a code color theme like Monokai or something similar, how can I do that?

Below you can see the current dark theme in the dev tools:

[ firefox dark theme screenshot [1]

How do I change the theme of Firefox developer?

Installing themesClick on the theme's author to see more information about it. Click the + Install Theme button. To install a theme from addons.mozilla.org, click on the theme and select the + Install Theme button on the resulting page.

It's not documented (yet), but you could make an Add-on that uses gDevTools.registerTheme(themeDefinition) to create your own dev tools theme.