Examine source code of Nortalous

{
  "theme": {
    "images": {
      "theme_frame": "colorcover3rbig.png"
    },
    "colors": {
      "frame": "#1e3327",
      "tab_background_text": "#161d24"
    }
  },
  "version": "2.0",
  "name": "Nortalous",
  "manifest_version": 2,
  "description": "Randomness"
}