Examine source code of From Minecraft with love

{
  "theme": {
    "images": {
      "theme_frame": "Ylosa1pieni.png"
    },
    "colors": {
      "frame": "#807d7d",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "From Minecraft with love",
  "manifest_version": 2,
  "description": "A minecraft persona, The image is a picture I took with Zombuster's cantographer program."
}