Examine source code of Doom Wings

{
  "theme": {
    "images": {
      "theme_frame": "FFP1H.PNG"
    },
    "colors": {
      "frame": "#88ba8b",
      "tab_background_text": "#253322"
    }
  },
  "version": "2.0",
  "name": "Doom Wings",
  "manifest_version": 2,
  "description": "Intricate designs and shading affects for intense web browsing."
}