Examine source code of Don't Cross Maximus

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#121c14",
      "tab_background_text": "#e9ffe5"
    }
  },
  "version": "2.0",
  "name": "Don't Cross Maximus",
  "manifest_version": 2,
  "description": "Disney's Tangled.\nRapunzel, Pascal, Flynn (Eugene) and Maximus (the horse) in a sword fight."
}