Examine source code of Manchester_united

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#f50505",
      "tab_background_text": "#f70a0a"
    }
  },
  "version": "2.0",
  "name": "Manchester_united",
  "manifest_version": 2,
  "description": "some images of MU"
}