Examine source code of Nord Dark Theme

{
  "manifest_version": 2,
  "name": "Nord Theme",
  "version": "1.4",
  "description": "A Firefox Theme designed with nord color palette.",
  "theme": {
    "colors": {
      "frame": "#2E3440",
      "button_background_active": "#E5E9F0",
      "button_background_hover": "#4C566A",
      "icons": "#81A1C1",
      "icons_attention": "#88C0D0",
      "ntp_text": "#E5E9F0",
      "ntp_background": "#2E3440",
      "popup": "#2E3440",
      "popup_border": "#4C566A",
      "popup_highlight": "#4C566A",
      "popup_highlight_text": "#D8DEE9",
      "popup_text": "#81A1C1",
      "sidebar": "#2E3440",
      "sidebar_border": "#4C566A",
      "sidebar_text": "#E5E9F0",
      "sidebar_highlight": "#4C566A",
      "sidebar_highlight_text": "#D8DEE9",
      "tab_background_separator": "#88C0D0",
      "tab_line": "#ECEFF4",
      "tab_loading": "#EBCB8B",
      "tab_selected": "#3B4252",
      "tab_text": "#ECEFF4",
      "tab_background_text": "#81A1C1",
      "toolbar": "#3B4252",
      "toolbar_bottom_separator": "#2E3440",
      "toolbar_field": "#2E3440",
      "toolbar_field_border": "#4C566A",
      "toolbar_field_border_focus": "#D8DEE9",
      "toolbar_field_focus": "#2E3440",
      "toolbar_field_separator": "#81A1C1",
      "toolbar_field_highlight": "#88C0D0",
      "toolbar_field_highlight_text": "#3B4252",
      "toolbar_field_text": "#E5E9F0",
      "toolbar_field_text_focus": "#D8DEE9",
      "toolbar_text": "#81A1C1",
      "toolbar_top_separator": "#4C566A",
      "toolbar_vertical_separator": "#81A1C1"
    }
  }
}