Examine source code of RaBBit-KiLLa

{
  "theme": {
    "images": {
      "theme_frame": "Untitled-1.jpg"
    },
    "colors": {
      "frame": "#808080",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "RaBBit-KiLLa",
  "manifest_version": 2,
  "description": "I made this theme hope u like it,\nif u do... it will be nice if u will share it with your friends :D\n(because firefox build this app not that good probably the theme wont foot for ur screen, unless u have the same resolution or something...)"
}