the add-on is very great but it feel the add-on is seem very old last seen it update

Allowed me to do the small change I wanted for my favorite theme, but need to leave it active for changes to stick.

Simpler to use than the full version and it's possible to input color codes. The only thing missing is the ability to change the color of the annoying blue links in the drop down menu (in the recently updated Firefox UI).

This little theme creator work great! I was able to customize a dark theme to just the way I like it. Just drag-and-drop the theme elements. It could not have been easier.