Examine source code of Renaissance Black Menu

{
  "name": "Renaissance Black Menu",
  "author": "Skyline-ch",
  "manifest_version": 2,
  "version": "1.1",
  "description": "Menu black theme for theme FireFox Renaissance.",
  "theme": {
    "images": {
      "theme_frame": "ff35_header7.jpg"
    },
    "colors": {
      "frame": "#1E1E1E",
      "frame_inactive": "#BBBBBB",
      "tab_text": "#1E1E1E",
      "tab_background_text": "#363636",
      "tab_background_separator": "red",
      "tab_loading": "#d10028",
      "tab_selected": "#C7B398",
      "ntp_background": "#121212",
      "ntp_text": "#fff",
      "popup": "#1E1E1E",
      "popup_text": "#B7B7B7",
      "popup_border": "#121212",
      "popup_highlight": "#21252B",
      "popup_highlight_text": "#fff",
      "icons": "#1E1E1E",
      "bookmark_text": "#623E24",
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "#1E1E1E",
      "toolbar_top_separator": "#592D14",
      "toolbar_bottom_separator": "#592D14",
      "toolbar_vertical_separator": "#592D14",
      "toolbar_field": "#C7B398",
      "toolbar_field_text": "#241D14",
      "toolbar_field_border": "#121212",
      "toolbar_field_focus": "#2B2B2B",
      "toolbar_field_text_focus": "#DDC9B6",
      "toolbar_field_border_focus": "#1E1E1E",
      "toolbar_field_highlight": "#FBEBC7",
      "toolbar_field_highlight_text": "#1E1E1E",
      "button_background_hover": "rgba(199, 179, 152, 0.75)",
      "button_background_active": "rgba(98, 62, 36, 0.75)",
      "sidebar": "#23222B",
      "sidebar_text": "#EEEEEB",
      "sidebar_border": "rgb(18, 18, 18)",
      "sidebar_highlight": "#3A3941",
      "sidebar_highlight_text": "#DDC9B6"
    }
  }
}