Examine source code of Beautiful Clean White

{
  "manifest_version": 2,
  "version": "3.4",
  "name": "Beautiful Clean White",
  "author": "GODIE",
  "description": "Tema claro y agradable para Firefox.",
  "icons": {
    "32": "icon-32.png"
  },
  "theme": {
    "colors": {
      "frame": "#2a343d",
      "tab_background_text": "#dadada",
      "frame_inactive": "#34414b",
      "toolbar": "#ece9e9",
      "toolbar_field": "#ece9e9",
      "toolbar_field_text": "#333333",
      "toolbar_top_separator": "#202020",
      "toolbar_bottom_separator": "#cccccc",
      "toolbar_field_border": "#b4b3b3",
      "toolbar_field_border_focus": "#8e8e8e",
      "toolbar_field_highlight": "#5e60ff",
      "toolbar_field_highlight_text": "#eeeeee",
      "toolbar_vertical_separator": "#cccccc",
      "bookmark_text": "#333333",
      "button_background_hover": "#cacaca",
      "button_background_active": "#a7a7a7",
      "icons": "#595959",
      "icons_attention": "#555555",
      "ntp_background": "#e8e7e7",
      "ntp_text": "#2a2a2a",
      "ntp_card_background": "#f3f2f2",
      "popup": "#efeeeeF8",
      "popup_text": "#373737",
      "popup_border": "#10101050",
      "popup_highlight": "#5070c0",
      "sidebar": "#f4f3f3",
      "sidebar_text": "#303030",
      "sidebar_border": "#dfdfdf",
      "sidebar_highlight": "#606060",
      "sidebar_highlight_text": "#EEEEEE",
      "tab_line": "#2a343d00",
      "tab_loading": "#252525",
      "tab_selected": "#ece9e9",
      "tab_background_separator": "#bbbbbb",
      "tab_text": "#242d42"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ef486f6a-3e61-4d66-86a8-bd5a0f995fbd}"
    }
  }
}