Examine source code of Lightnin'

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Lightnin'",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(171, 150, 232, 0)",
      "toolbar_text": "rgb(242, 224, 173)",
      "frame": "rgb(62, 90, 104)",
      "tab_background_text": "rgb(244, 233, 201)",
      "toolbar_field": "rgba(33, 46, 174, 0.06)",
      "toolbar_field_text": "rgb(185, 181, 154)",
      "tab_line": "rgb(9, 2, 78)",
      "popup": "rgba(10, 10, 8, 0.34)",
      "popup_text": "rgb(249, 225, 201)",
      "button_background_active": "rgba(9, 151, 238, 0.59)",
      "button_background_hover": "rgba(225, 219, 5, 0.79)",
      "frame_inactive": "rgba(230, 28, 11, 0.04)",
      "icons_attention": "rgba(15, 37, 194, 0.69)",
      "icons": "rgb(242, 224, 173)",
      "ntp_background": "rgba(93, 78, 49, 0.15)",
      "ntp_text": "rgb(245, 223, 106)",
      "popup_border": "rgba(9, 47, 248, 0.97)",
      "popup_highlight_text": "rgb(34, 236, 181)",
      "popup_highlight": "rgba(248, 132, 9, 0.98)",
      "sidebar_border": "rgba(223, 44, 29, 0.04)",
      "sidebar_highlight_text": "rgba(247, 203, 95, 0.95)",
      "sidebar_highlight": "rgba(8, 120, 236, 0.3)",
      "sidebar_text": "rgba(210, 192, 3, 0.95)",
      "sidebar": "rgb(23, 20, 0)",
      "tab_loading": "rgba(8, 225, 55, 0.97)",
      "tab_selected": "rgba(6, 86, 139, 0.52)",
      "tab_text": "rgb(239, 240, 201)",
      "toolbar_bottom_separator": "rgba(60, 50, 47, 0.11)",
      "toolbar_field_border_focus": "rgba(11, 3, 227, 0.98)",
      "toolbar_field_border": "rgba(29, 18, 234, 0.97)",
      "toolbar_field_focus": "rgba(72, 47, 2, 0.09)",
      "toolbar_field_highlight": "rgba(94, 92, 249, 0.93)",
      "toolbar_field_separator": "rgba(129, 131, 218, 0.95)",
      "toolbar_field_text_focus": "rgba(3, 2, 96, 0.98)",
      "toolbar_top_separator": "rgba(201, 18, 45, 0.17)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{83ca7ad6-0ec7-4cf0-960a-3c151027d55b}"
    }
  }
}