Examine source code of color bubbles 1

{
  "theme": {
    "images": {
      "theme_frame": "a3.jpg"
    },
    "colors": {
      "frame": "#050505",
      "tab_background_text": "#f7f4f4"
    }
  },
  "version": "2.0",
  "name": "color bubbles 1",
  "manifest_version": 2,
  "description": "Glittering color bubbles"
}