Examine source code of zombie metal

{
  "name": "R (1)",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "p[pp.jpg"
    },
    "colors": {
      "frame": "rgba(3, 204, 240, 1)",
      "tab_background_text": "rgba(0, 255, 251, 1)",
      "toolbar": "rgba(4, 120, 140, 1)",
      "bookmark_text": "rgba(0, 230, 255, 1)",
      "toolbar_field": "rgba(2, 126, 148, 1)",
      "toolbar_field_text": "rgba(5, 245, 241, 1)",
      "tab_line": "rgba(42, 158, 166, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{176949db-2a36-43e4-bd28-5f9e085ef1ed}"
    }
  }
}