Examine source code of SF niners

{
  "theme": {
    "images": {
      "theme_frame": "49ers.jpg"
    },
    "colors": {
      "frame": "#120d0d",
      "tab_background_text": "#210b0b"
    }
  },
  "version": "2.0",
  "name": "SF niners",
  "manifest_version": 2,
  "description": "players and logos of the 49ers"
}