Examine source code of Optical Illusion

{
  "theme": {
    "images": {
      "theme_frame": "trippy1.jpg"
    },
    "colors": {
      "frame": "#ff4800",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "Optical Illusion",
  "manifest_version": 2,
  "description": "This makes your eyes trip a little.  Probably not great for web browsing."
}