Examine source code of Nord Improved

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nord Improved",
  "theme": {
    "colors": {
      "frame": "#2e3440",
      "toolbar": "#3b4252",
      "tab_text": "#eceff4",
      "tab_loading": "#81a1c1",
      "tab_line": "#5e81ac",
      "tab_selected": "#434c5e",
      "bookmark_text": "#d8dee9",
      "icons": "#d8dee9",
      "icons_attention": "#5e81ac",
      "tab_background_text": "#d8dee9",
      "toolbar_field": "#2e3440",
      "toolbar_field_text": "#eceff4",
      "toolbar_field_focus": "#434c5e",
      "toolbar_field_border_focus": "#5e81ac",
      "toolbar_field_highlight": "#5e81ac",
      "toolbar_field_highlight_text": "#eceff4",
      "toolbar_top_separator": "#3b4252",
      "toolbar_bottom_separator": "#3b4252",
      "popup": "#434c5e",
      "popup_text": "#eceff4",
      "popup_highlight": "#5e81ac",
      "popup_highlight_text": "#2e3440",
      "popup_border": "#4c566a",
      "ntp_background": "#2b2a33",
      "ntp_text": "#d8dee9",
      "sidebar": "#434c5e",
      "sidebar_text": "#eceff4",
      "sidebar_highlight": "#5e81ac",
      "sidebar_highlight_text": "#2e3440",
      "sidebar_border": "#4c566a"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5c82ec27-6d77-491b-b113-04969fdbf788}"
    }
  }
}