Examine source code of Burgerkill 3

{
  "theme": {
    "images": {
      "theme_frame": "vvv.jpg"
    },
    "colors": {
      "frame": "#fa7e03",
      "tab_background_text": "#fa7e03"
    }
  },
  "version": "2.0",
  "name": "Burgerkill 3",
  "manifest_version": 2,
  "description": "Burgerkill 3"
}