Examine source code of Fog & Forest

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Forest",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(46, 46, 46, 0.67)",
      "toolbar_text": "rgb(163, 163, 163)",
      "frame": "rgb(83, 83, 83)",
      "tab_background_text": "rgb(155, 155, 155)",
      "toolbar_field": "rgba(69, 69, 69, 0.44)",
      "toolbar_field_text": "rgba(185, 185, 185, 0.43)",
      "tab_line": "rgba(84, 84, 84, 0)",
      "popup": "rgb(49, 49, 49)",
      "popup_text": "rgb(199, 199, 199)",
      "button_background_active": "rgba(152, 152, 152, 0)",
      "button_background_hover": "rgba(95, 95, 95, 0.21)",
      "frame_inactive": "rgba(134, 134, 134, 0)",
      "icons_attention": "rgba(0, 0, 0, 0.29)",
      "icons": "rgb(187, 187, 187)",
      "ntp_background": "rgb(67, 67, 66)",
      "ntp_text": "rgb(95, 95, 95)",
      "popup_border": "rgba(0, 0, 0, 0)",
      "popup_highlight_text": "rgb(241, 241, 241)",
      "popup_highlight": "rgba(148, 148, 148, 0.47)",
      "sidebar_border": "rgba(165, 165, 160, 0)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgba(185, 185, 185, 0.43)",
      "sidebar_text": "rgb(233, 233, 233)",
      "sidebar": "rgb(51, 51, 51)",
      "tab_background_separator": "rgba(191, 25, 101, 0)",
      "tab_loading": "rgba(180, 180, 180, 0.48)",
      "tab_selected": "rgba(50, 50, 50, 0.53)",
      "tab_text": "rgb(150, 150, 150)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0)",
      "toolbar_field_border_focus": "rgba(18, 18, 18, 0)",
      "toolbar_field_border": "rgba(175, 175, 171, 0)",
      "toolbar_field_focus": "rgb(74, 74, 74)",
      "toolbar_field_highlight_text": "rgb(214, 214, 214)",
      "toolbar_field_highlight": "rgba(203, 203, 203, 0.38)",
      "toolbar_field_separator": "rgba(0, 0, 0, 0.39)",
      "toolbar_field_text_focus": "rgb(190, 190, 190)",
      "toolbar_top_separator": "rgba(0, 255, 0, 0)",
      "toolbar_vertical_separator": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dd957726-1806-4cb7-9090-47ab075a7cfe}"
    }
  }
}