Examine source code of midnight

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "midnight",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center",
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(171, 150, 232, 0.04)",
      "toolbar_text": "rgb(242, 224, 173)",
      "frame": "rgb(62, 90, 104)",
      "tab_background_text": "rgb(246, 241, 200)",
      "toolbar_field": "rgba(37, 49, 172, 0.33)",
      "toolbar_field_text": "rgb(185, 181, 154)",
      "tab_line": "rgb(30, 5, 196)",
      "popup": "rgba(11, 16, 72, 0.78)",
      "popup_text": "rgb(226, 221, 254)",
      "button_background_active": "rgba(7, 34, 206, 0.93)",
      "button_background_hover": "rgba(56, 5, 194, 0.94)",
      "frame_inactive": "rgba(230, 28, 11, 0.04)",
      "icons_attention": "rgba(15, 37, 194, 0.69)",
      "icons": "rgba(236, 230, 225, 0.69)",
      "ntp_background": "rgba(1, 10, 70, 0.69)",
      "ntp_text": "rgb(21, 7, 204)",
      "popup_border": "rgba(4, 38, 215, 0.97)",
      "popup_highlight": "rgba(75, 16, 247, 0.79)",
      "sidebar_border": "rgba(223, 44, 29, 0.04)",
      "sidebar_highlight_text": "rgba(65, 9, 234, 0.95)",
      "sidebar_highlight": "rgba(7, 230, 55, 0.97)",
      "sidebar_text": "rgba(208, 4, 136, 0.95)",
      "sidebar": "rgb(34, 18, 240)",
      "tab_loading": "rgba(8, 225, 55, 0.97)",
      "toolbar_field_border_focus": "rgba(1, 16, 70, 0.97)",
      "toolbar_field_border": "rgb(7, 2, 98)",
      "toolbar_field_focus": "rgba(1, 3, 54, 0.69)",
      "toolbar_field_highlight": "rgba(108, 95, 247, 0.57)",
      "toolbar_field_separator": "rgb(106, 65, 70)",
      "toolbar_field_text_focus": "rgba(235, 145, 12, 0.57)",
      "toolbar_top_separator": "rgba(201, 18, 45, 0.17)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{62fe1237-d2d6-425d-b3d6-cae9fdedb465}"
    }
  }
}