Examine source code of Captain Marvel

{
  "theme": {
    "images": {
      "theme_frame": "captmarvheader.jpg"
    },
    "colors": {
      "frame": "#047a0c",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Captain Marvel",
  "manifest_version": 2,
  "description": "The greatest comic book hero ever!!!"
}