Examine source code of Pixelated Skies

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#2f054f",
      "tab_background_text": "#8c5cf2"
    }
  },
  "version": "2.0",
  "name": "Pixelated Skies",
  "manifest_version": 2,
  "description": "Night sky clouds that overlay each other accompanied with stars in the background."
}