Examine source code of Metallica M

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#e8d3ca",
      "tab_background_text": "#451a00"
    }
  },
  "version": "2.0",
  "name": "Metallica M",
  "manifest_version": 2,
  "description": "Best Theme Of Metallica for big monitors!!!"
}