gecko/browser/base/content/tabbrowser.css

.tabbrowser-tabs {
  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-tabs");
}

.tabbrowser-tab {
  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-tab");
}

.tabbrowser-arrowscrollbox {
  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-arrowscrollbox");
}

.tabs-alltabs-popup {
  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-alltabs-popup");
}

.tab-close-button,
.tabs-closebutton {
  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-close-tab-button");
}

.tab-close-button {
  display: none;
}

.tabbrowser-tabs:not([closebuttons="noclose"]):not([closebuttons="closeatend"]) > .tabbrowser-tab[selected="true"]:not(:only-child) > .tab-close-button {
  display: -moz-box;
}

.tabbrowser-tabs[closebuttons="alltabs"] > .tabbrowser-tab:not(:only-child) > .tab-close-button {
  display: -moz-box;
}

.tabs-container:not([overflow="true"]) > .tabs-newtab-button,
.tabs-container[overflow="true"] > .tabbrowser-arrowscrollbox > .tabs-newtab-button {
  visibility: collapse;
}

.tabs-newtab-button > .toolbarbutton-text {
  display: none;
}

tabpanels {
  background-color: white;
}

%ifdef MOZ_WIDGET_GTK2
/* Favicons override the "images-in-menus" metric in xul.css */
.alltabs-item > .menu-iconic-left {
  visibility: inherit;
}
%endif