Examine source code of green bubbles2

{
  "theme": {
    "images": {
      "theme_frame": "burbujasH.png"
    },
    "colors": {
      "frame": "#91eefa",
      "tab_background_text": "#edfc68"
    }
  },
  "version": "2.0",
  "name": "green bubbles2",
  "manifest_version": 2,
  "description": "glu,glu,glu"
}