Examine source code of Cliffside

{
  "theme": {
    "images": {
      "theme_frame": "Cliffsidetop.jpg"
    },
    "colors": {
      "frame": "#363534",
      "tab_background_text": "#006603"
    }
  },
  "version": "2.0",
  "name": "Cliffside",
  "manifest_version": 2,
  "description": "A beautiful cliff-side now makes your Firefox climb-able :3"
}