Examine source code of Superman and Batman

{
  "theme": {
    "images": {
      "theme_frame": "Superman_and_Batman-h.JPG"
    },
    "colors": {
      "frame": "#4a0303",
      "tab_background_text": "#fcf9f9"
    }
  },
  "version": "2.0",
  "name": "Superman and Batman",
  "manifest_version": 2,
  "description": "The impressive design of the superman and batman on the evening-sun background."
}