Examine source code of Half life nebula

{
  "theme": {
    "images": {
      "theme_frame": "halflifenebula.jpg"
    },
    "colors": {
      "frame": "#0d0a0a",
      "tab_background_text": "#ba14b7"
    }
  },
  "version": "2.0",
  "name": "Half life nebula",
  "manifest_version": 2,
  "description": "Half life xendog improved"
}