Examine source code of GOW III V2.1

{
  "theme": {
    "images": {
      "theme_frame": "Mozilla-Encabezado.png"
    },
    "colors": {
      "frame": "#080808",
      "tab_background_text": "#0a0a0a"
    }
  },
  "version": "2.0",
  "name": "GOW III V2.1",
  "manifest_version": 2
}