Examine source code of F.C.B.

{
  "theme": {
    "images": {
      "theme_frame": "F.C.B.fejlc.jpg"
    },
    "colors": {
      "frame": "#2254ba",
      "tab_background_text": "#2254ba"
    }
  },
  "version": "2.0",
  "name": "F.C.B.",
  "manifest_version": 2,
  "description": "Nincs"
}