Examine source code of Rock & Astaroth

{
  "theme": {
    "images": {
      "theme_frame": "Rock-Asth.jpg"
    },
    "colors": {
      "frame": "#533778",
      "tab_background_text": "#c7a575"
    }
  },
  "version": "2.0",
  "name": "Rock & Astaroth",
  "manifest_version": 2,
  "description": "Rock, The White Giant, Astaroth, The Black Giant, Soul Calibur IV"
}