Examine source code of Nightly Silver Fox

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nightly Silver Fox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(150, 155, 177, 0)",
      "toolbar_text": "rgb(225, 230, 244)",
      "frame": "rgb(150, 155, 177)",
      "tab_background_text": "rgb(40, 47, 64)",
      "toolbar_field": "rgba(89, 139, 255, 0.95)",
      "toolbar_field_text": "rgb(40, 47, 64)",
      "tab_line": "rgb(150, 155, 177)",
      "popup": "rgb(103, 106, 116)",
      "popup_text": "rgb(203, 208, 221)",
      "button_background_active": "rgb(109, 113, 130)",
      "button_background_hover": "rgba(91, 141, 255, 0.95)",
      "frame_inactive": "rgba(255, 234, 232, 0.95)",
      "icons_attention": "rgb(0, 196, 255)",
      "ntp_background": "rgb(171, 176, 202)",
      "popup_border": "rgb(40, 47, 64)",
      "popup_highlight": "rgb(103, 106, 116)",
      "sidebar_border": "rgb(103, 106, 116)",
      "sidebar_highlight": "rgb(5, 16, 44)",
      "sidebar_text": "rgb(197, 203, 230)",
      "sidebar": "rgb(40, 47, 64)",
      "tab_loading": "rgb(150, 155, 177)",
      "tab_selected": "rgb(103, 106, 116)",
      "tab_text": "rgb(203, 208, 221)",
      "toolbar_bottom_separator": "rgb(103, 106, 116)",
      "toolbar_field_border_focus": "rgba(89, 139, 255, 0.95)",
      "toolbar_field_border": "rgb(103, 106, 116)",
      "toolbar_field_focus": "rgba(121, 160, 251, 0.96)",
      "toolbar_field_highlight_text": "rgb(40, 47, 64)",
      "toolbar_field_highlight": "rgb(203, 208, 221)",
      "toolbar_field_text_focus": "rgba(35, 37, 40, 0.95)",
      "toolbar_top_separator": "rgba(150, 155, 177, 0)",
      "toolbar_vertical_separator": "rgba(194, 198, 215, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8f99f14e-83a5-4653-bbb0-01b897d4efc2}"
    }
  }
}