Examine source code of Nord

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nord",
  "description": "A theme with a nord color scheme.",
  "author": "ArrJay",
  "theme": {
    "properties": {
      "content_color_scheme": "dark"
    },
    "colors": {
      "bookmark_text": "#ECEFF4",
      "button_background_active": "",
      "button_background_hover": "",
      "icons": "#ECEFF4",
      "icons_attention": "#81A1C1",
      "frame": "#2E3440",
      "frame_inactive": "#434C5E",
      "ntp_background": "#2E3440",
      "ntp_text": "#ECEFF4",
      "popup": "#434C5E",
      "popup_border": "#434C5E",
      "popup_highlight": "",
      "popup_highlight_text": "#ECEFF4",
      "popup_text": "#ECEFF4",
      "sidebar": "#2E3440",
      "sidebar_border": "#4C566A",
      "sidebar_highlight": "#5E81AC",
      "sidebar_highlight_text": "#ECEFF4",
      "sidebar_text": "#ECEFF4",
      "tab_background_text": "#D8DEE9",
      "tab_line": "#3B4252",
      "tab_loading": "#5E81AC",
      "tab_selected": "#3B4252",
      "tab_text": "#ECEFF4",
      "toolbar": "#3B4252",
      "toolbar_bottom_separator": "#3B4252",
      "toolbar_field": "#4C566A",
      "toolbar_field_border": "#3B4252",
      "toolbar_field_border_focus": "#5E81AC",
      "toolbar_field_focus": "#4C566A",
      "toolbar_field_highlight": "#5E81AC",
      "toolbar_field_highlight_text": "#ECEFF4",
      "toolbar_field_text": "#ECEFF4",
      "toolbar_field_text_focus": "#ECEFF4",
      "toolbar_text": "#ECEFF4",
      "toolbar_top_separator": "#3B4252",
      "toolbar_vertical_separator": "#4C566A"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{106a0e58-3534-4a14-bf18-39a0fab61432}"
    }
  }
}