Examine source code of nCreation

{
  "theme": {
    "images": {
      "theme_frame": "t1.jpg"
    },
    "colors": {
      "frame": "#474343",
      "tab_background_text": "#37d2ed"
    }
  },
  "version": "2.0",
  "name": "nCreation",
  "manifest_version": 2,
  "description": "I love inspiring color to decorate my Firefox. Then i can have some fun while my eyes are shining."
}