userChrome.css

@namespace html url("http://www.w3.org/1999/xhtml");
@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

@import url(theme/all-global-positioning.css);
@import url(theme/schemes.css);

@import url(theme/function/sidebar-autohide.css);
@import url(theme/function/privatemode.css); /* sourced from MOG */
@import url(theme/function/urlbar.css);
@import url(theme/function/extensions-menu.css);

@import url(theme/xstyle.css);
@import url(theme/context-menu.css);
@import url(theme/extended-statusbar.css);
@import url(theme/sidebar.css);
@import url(theme/findbar.css);
@import url(theme/PIP.css);
@import url(theme/tab-audio-indicator.css);
@import url(theme/configurations.css);
@import url(theme/icons.css);

/* Reduce left spacer on non-maximized windows */
.titlebar-spacer[type="pre-tabs"] {
  display: none !important;
  visibility: hidden !important;
  width: 0 !important;
}

/* Reduce left spacer on non-maximized windows */
.titlebar-spacer[type="post-tabs"] {
  visibility: hidden !important;
  display: none !important;
  width: 0 !important;
}
/* Reduce left spacer on non-maximized windows */
.titlebar-spacer {
  visibility: hidden !important;
  display: none !important;
  width: 0 !important;
}