Examine source code of Night Watch

{
  "manifest_version": 2,
  "version": "1.2.0",
  "name": "Night Watch",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(25, 30, 54)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(11, 11, 26)",
      "tab_background_text": "rgb(196, 196, 196)",
      "toolbar_field": "rgba(7, 7, 8, 0.58)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(27, 163, 143)",
      "popup": "rgb(31, 35, 65)",
      "popup_text": "rgb(220, 220, 220)",
      "button_background_active": "rgb(78, 62, 154)",
      "button_background_hover": "rgb(69, 75, 128)",
      "ntp_background": "rgb(12, 8, 31)",
      "ntp_text": "rgb(234, 234, 234)",
      "sidebar_border": "rgb(68, 68, 237)",
      "sidebar_highlight": "rgb(82, 82, 238)",
      "sidebar_text": "rgb(243, 243, 243)",
      "sidebar": "rgb(23, 23, 45)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(27, 163, 143)",
      "toolbar_field_focus": "rgba(0, 0, 0, 0.21)",
      "toolbar_top_separator": "rgb(68, 68, 237)",
      "tab_loading": "rgb(27, 163, 143)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd5a7d39-3c6b-412e-bd6f-14766ef9a21c}"
    }
  }
}