Examine source code of Space Crystals

{
  "theme": {
    "images": {
      "theme_frame": "SpaceCrystals-ObenFrFirefoxPersona.jpg"
    },
    "colors": {
      "frame": "#118c0b",
      "tab_background_text": "#050505"
    }
  },
  "version": "2.0",
  "name": "Space Crystals",
  "manifest_version": 2,
  "description": "Space Crystals is a Dream of wonderful Colors. And this Persona is for every Browser a awesome Picture. Have fun with it. Your Graphic Wizard."
}