Examine source code of Esperanto-flago

{
  "theme": {
    "images": {
      "theme_frame": "cabeca.jpg"
    },
    "colors": {
      "frame": "#030000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Esperanto-flago",
  "manifest_version": 2,
  "description": "Por chiuj esperantistoj, kiuj amas nian internacian lingvon.\n\nFor all esperantist, who love our international language."
}