Examine source code of Dark Night Pro

{
  "manifest_version": 2,
  "version": "1.5",
  "name": "Dark Night Pro",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(58, 57, 68)",
      "toolbar_text": "rgb(134, 134, 142)",
      "frame": "rgb(37, 37, 38)",
      "tab_background_text": "rgb(134, 134, 142)",
      "toolbar_field": "rgb(37, 37, 38)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(32, 173, 204, 0)",
      "popup": "rgb(43, 42, 51)",
      "popup_text": "rgb(251, 251, 254)",
      "button_background_active": "rgb(43, 42, 51)",
      "button_background_hover": "rgb(67, 66, 77)",
      "icons_attention": "rgb(10, 132, 255)",
      "icons": "rgb(134, 134, 142)",
      "popup_border": "rgba(91, 91, 102, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "tab_selected": "rgb(58, 57, 68)",
      "tab_text": "rgb(251, 251, 254)",
      "toolbar_bottom_separator": "rgb(58, 57, 68)",
      "toolbar_field_border_focus": "rgba(38, 100, 228, 0)",
      "toolbar_field_border": "rgba(219, 24, 24, 0)",
      "toolbar_top_separator": "rgba(159, 117, 117, 0)",
      "toolbar_vertical_separator": "rgb(89, 88, 98)",
      "tab_loading": "rgba(32, 173, 204, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{179711a5-389b-4f75-9bf4-196fde25a0fe}"
    }
  }
}