Examine source code of salva flag

{
  "theme": {
    "images": {
      "theme_frame": "elsalvador.jpg"
    },
    "colors": {
      "frame": "#f0e2e2",
      "tab_background_text": "#f5f1ed"
    }
  },
  "version": "2.0",
  "name": "salva flag",
  "manifest_version": 2,
  "description": "flag"
}