Examine source code of ISF-creatures

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffc942",
      "tab_background_text": "#d92929"
    }
  },
  "version": "2.0",
  "name": "ISF-creatures",
  "manifest_version": 2,
  "description": "An ISF approved theme emphasizing on pets and the overpopulation problem."
}