Examine source code of Thunder Clouds

{
  "theme": {
    "images": {
      "theme_frame": "PersonaforGoogle.jpg"
    },
    "colors": {
      "frame": "#6494db",
      "tab_background_text": "#edebf5"
    }
  },
  "version": "2.0",
  "name": "Thunder Clouds",
  "manifest_version": 2,
  "description": "Thunder Clouds"
}