Examine source code of Blue and yellow bubbles

{
  "theme": {
    "images": {
      "theme_frame": "Persona14.jpg"
    },
    "colors": {
      "frame": "#85ab07",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue and yellow bubbles",
  "manifest_version": 2,
  "description": "It looks like a lot of blue and yellow bubbles, with a nice background."
}