Examine source code of Coffee Break

{
  "name": "Coffee  Break",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "CoffeeBreakH2.jpg"
    },
    "colors": {
      "frame": "rgba(89, 58, 24, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(89, 58, 23, 0.05)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(92, 61, 24, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0630dc19-1020-4b48-ab1a-d3e64b637204}"
    }
  }
}