Examine source code of Witchdoctor

{
  "manifest_version": 2,
  "version": "3",
  "name": "witchdoctor",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(80, 81, 81, 0.75)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(64, 80, 82)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(45, 47, 47, 0.79)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(41, 120, 192)",
      "popup": "rgb(74, 79, 79)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(128, 120, 27)",
      "button_background_hover": "rgba(125, 95, 23, 0.95)",
      "frame_inactive": "rgb(108, 108, 108)",
      "ntp_background": "rgba(98, 103, 105, 0.21)",
      "popup_border": "rgb(192, 180, 41)",
      "popup_highlight_text": "rgba(7, 67, 67, 0.91)",
      "popup_highlight": "rgb(143, 143, 143)",
      "sidebar_border": "rgb(0, 0, 0)",
      "sidebar_highlight": "rgb(41, 120, 192)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(74, 79, 79)",
      "tab_background_separator": "rgb(255, 255, 255)",
      "tab_loading": "rgba(44, 58, 60, 0.86)",
      "tab_selected": "rgba(59, 60, 60, 0.75)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgb(98, 100, 100)",
      "toolbar_field_border": "rgb(0, 0, 0)",
      "toolbar_field_focus": "rgba(5, 59, 59, 0.84)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(96, 98, 98)",
      "toolbar_field_separator": "rgb(65, 176, 183)",
      "toolbar_field_text_focus": "rgba(255, 241, 0, 0)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0)",
      "toolbar_vertical_separator": "rgb(169, 120, 183)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a915096e-21c5-4c28-8c4c-5cd7a5a519ec}"
    }
  }
}