Examine source code of Enhaced Modern Theme

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "strict_min_version": "58.0"
    }
  },
  "name": "Enhaced Modern Theme",
  "version": "3.0",
  "description": "Enhaced Modern Theme for Firefox",
  "theme": {
    "colors": {
      "tab_line": "rgba(71, 237, 255, 1)",
      "tab_loading": "#530694",
      "tab_background_text": "rgba(71, 237, 255, 0.35)",
      "icons_attention": "#870fd1",
      "icons": "rgba(71, 237, 255, 0.75)",
      "toolbar": "#2b2b2b",
      "toolbar_top_separator": "rgba(71, 237, 255, 0.35)",
      "toolbar_bottom_separator": "rgba(71, 237, 255, 0.35)",
      "toolbar_vertical_separator": "rgba(7, 192, 217, 0.5)",
      "toolbar_field": "rgba(0,0,0,0.25)",
      "toolbar_field_text": "rgba(165, 140, 255, 1)",
      "toolbar_field_highlight": "#ce95ed",
      "toolbar_field_highlight_text": "#50027a",
      "toolbar_field_focus": "#120021",
      "toolbar_field_border": "rgba(165, 140, 255, 0.25)",
      "toolbar_field_separator": "rgba(197, 108, 245, 1)",
      "toolbar_field_border_focus": "#2a2b2c",
      "button_background_hover": "#038080",
      "button_background_active": "#034d4d",
      "popup": "#2b2b2b",
      "popup_text": "#77DDE7",
      "popup_border": "#005c66",
      "popup_highlight": "#545959",
      "popup_highlight_text": "#E3EAF3",
      "ntp_text": "rgba(165, 140, 255, 1)",
      "ntp_background": "#1c1c1c",
      "sidebar": "#2b2b2b",
      "sidebar_text": "rgba(165, 140, 255, 1)",
      "sidebar_border": "#470066",
      "sidebar_highlight": "#c56cf5",
      "sidebar_highlight_text": "#610394",
      "frame": "rgb(0,0,0)",
      "frame_inactive": "#190030",
      "bookmark_text": "rgba(110, 255, 233, 1)"
    }
  }
}