Examine source code of Chrome Earth2

{
  "theme": {
    "images": {
      "theme_frame": "ChromeEarth2.jpg"
    },
    "colors": {
      "frame": "#080000",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "Chrome Earth2",
  "manifest_version": 2,
  "description": "Another chrome earth on the sea.\nSee more illustrations and animations from PeakPixels on YouTube."
}