Examine source code of Brown space bubbles

{
  "theme": {
    "images": {
      "theme_frame": "brownbubbles.png"
    },
    "colors": {
      "frame": "#fa6203",
      "tab_background_text": "#fae482"
    }
  },
  "version": "2.0",
  "name": "Brown space bubbles",
  "manifest_version": 2,
  "description": "Bubbles like galaxies lost in space"
}