Examine source code of FEB_Brasil

{
  "theme": {
    "images": {
      "theme_frame": "2500.JPG"
    },
    "colors": {
      "frame": "#f50808",
      "tab_background_text": "#f20c0c"
    }
  },
  "version": "2.0",
  "name": "FEB_Brasil",
  "manifest_version": 2,
  "description": "FEB Brasil segunda guerra mundial world war II mato grosso do sul"
}