Examine source code of halibel

{
  "theme": {
    "images": {
      "theme_frame": "sample.jpg"
    },
    "colors": {
      "frame": "#e3cf35",
      "tab_background_text": "#edcd00"
    }
  },
  "version": "2.0",
  "name": "halibel",
  "manifest_version": 2,
  "description": "halibel"
}