Examine source code of Metallica Load

{
  "theme": {
    "images": {
      "theme_frame": "LoadPersonaHeadcopy.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Metallica Load",
  "manifest_version": 2,
  "description": "So tear me open, pour me out, there's things inside that scream and shout and the pain still hates me, so hold me until it sleeps."
}