Examine source code of Aqua Circuits

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#1b1c1c",
      "tab_background_text": "#00ffff"
    }
  },
  "version": "2.0",
  "name": "Aqua Circuits",
  "manifest_version": 2,
  "description": "This is a circuit board theme header with style and modern look to add to your browser in Firefox."
}