Examine source code of Nightly Fox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nightly Fox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(32, 16, 60)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgb(0, 245, 255)",
      "tab_line": "rgba(245, 245, 255, 0)",
      "popup": "rgba(32, 16, 60, 0.97)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(255, 255, 255, 0.3)",
      "button_background_hover": "rgba(255, 255, 255, 0.11)",
      "icons_attention": "rgb(0, 245, 255)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(32, 16, 60)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(0, 245, 255)",
      "popup_highlight_text": "rgb(0, 0, 0)",
      "popup_highlight": "rgb(0, 245, 255)",
      "sidebar_border": "rgba(255, 255, 255, 0.3)",
      "sidebar_highlight_text": "rgb(0, 0, 0)",
      "sidebar_highlight": "rgb(0, 245, 255)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(32, 16, 60)",
      "tab_background_separator": "rgba(2, 245, 255, 0)",
      "tab_loading": "rgb(255, 255, 255)",
      "tab_selected": "rgba(255, 255, 255, 0.3)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgb(0, 245, 255)",
      "toolbar_field_border": "rgba(255, 255, 255, 0.3)",
      "toolbar_field_focus": "rgba(32, 16, 60, 0.97)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(0, 245, 255)",
      "toolbar_field_separator": "rgba(124, 0, 255, 0)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgba(124, 0, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{352a3920-b23b-4bde-8489-d4075a5419fc}"
    }
  }
}