gecko-dev/browser/base/content/browser.css

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

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

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

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

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

toolbar[printpreview="true"] {
  -moz-binding: url("chrome://global/content/printPreviewBindings.xml#printpreviewtoolbar");
}

#navigator-toolbox > toolbar:not(#TabsToolbar) {
  -moz-box-ordinal-group: 50;
}

#TabsToolbar {
  -moz-box-ordinal-group: 100;
}

#navigator-toolbox[tabsontop="true"] > #TabsToolbar {
  -moz-box-ordinal-group: 10;
}

toolbarpaletteitem[place="palette"] > toolbaritem > hbox[type="places"] {
  display: none;
}

toolbar[mode="icons"] > #reload-button:not([displaystop]) + #stop-button,
toolbar[mode="icons"] > #reload-button[displaystop] {
  visibility: collapse;
}

#main-window:-moz-lwtheme {
  background-repeat: no-repeat;
  background-position: top right;
}

%ifdef XP_MACOSX
#main-window[inFullscreen="true"] {
  padding-top: 0; /* override drawintitlebar="true" */
}
%endif

#browser-bottombox[lwthemefooter="true"] {
  background-repeat: no-repeat;
  background-position: bottom left;
}

/* ::::: location bar ::::: */
#urlbar {
  -moz-binding: url(chrome://browser/content/urlbarBindings.xml#urlbar);
}

/* Some child nodes want to be ordered based on the locale's direction, while
   everything else should be ltr. */
#urlbar:-moz-locale-dir(rtl) > .autocomplete-textbox-container > .textbox-input-box {
  direction: rtl;
}

#urlbar html|*.autocomplete-textbox {
  direction: ltr;
}

/* For results that are actions, their description text is shown instead of
   the URL - this needs to follow the locale's direction, unlike URLs. */
richlistitem[type="action"]:-moz-locale-dir(rtl) > .ac-url-box {
  direction: rtl;
}

#urlbar:not([actiontype]) > #urlbar-display {
  display: none;
}

#wrapper-urlbar-container > #urlbar-container > #urlbar {
  -moz-user-input: disabled;
  cursor: -moz-grab;
}

#PopupAutoComplete {
  -moz-binding: url("chrome://browser/content/urlbarBindings.xml#browser-autocomplete-result-popup");
}

#PopupAutoCompleteRichResult {
  -moz-binding: url("chrome://browser/content/urlbarBindings.xml#urlbar-rich-result-popup");
}

#urlbar-throbber:not([busy="true"]),
#urlbar-throbber[busy="true"] + #page-proxy-favicon {
  display: none;
}

#feed-button > .button-box > .box-inherit > .button-text,
#feed-button > .button-box > .button-menu-dropmarker {
  display: none;
}

#feed-menu > .feed-menuitem:-moz-locale-dir(rtl) {
  direction: rtl;
}

#urlbar[pageproxystate="invalid"] > #urlbar-icons > .urlbar-icon:not(#go-button),
#urlbar[pageproxystate="valid"] > #urlbar-icons > #go-button {
  visibility: collapse;
}

#identity-icon-labels {
  max-width: 18em;
}

#identity-icon-country-label {
  direction: ltr;
}

#identity-box.verifiedIdentity > #identity-box-inner > #identity-icon-labels > #identity-icon-label {
  -moz-margin-end: 0.25em !important;
}

#wrapper-search-container > #search-container > #searchbar > .searchbar-textbox > .autocomplete-textbox-container > .textbox-input-box > html|*.textbox-input {
  visibility: hidden;
}

/* ::::: Unified Back-/Forward Button ::::: */
#back-button > .toolbarbutton-menu-dropmarker,
#forward-button > .toolbarbutton-menu-dropmarker,
#back-forward-dropmarker > .toolbarbutton-icon,
#back-forward-dropmarker > .toolbarbutton-text {
  display: none;
}
.unified-nav-current {
  font-weight: bold;
}

toolbarbutton.bookmark-item {
  max-width: 13em;
}

#editBMPanel_tagsSelector {
  /* override default listbox width from xul.css */
  width: auto;
}

menuitem.spell-suggestion {
  font-weight: bold;
}

#sidebar-box toolbarbutton.tabs-closebutton {
  -moz-user-focus: normal;
}

/* apply Fitts' law to the notification bar's close button */
window[sizemode="maximized"] #content .notification-inner {
  border-right: 0px !important;
}

/* Hide extension toolbars that neglected to set the proper class */
window[chromehidden~="location"][chromehidden~="toolbar"] toolbar:not(.chromeclass-menubar),
window[chromehidden~="toolbar"] toolbar:not(.toolbar-primary):not(.chromeclass-menubar) {
  display: none;
}

#navigator-toolbox ,
#status-bar ,
#mainPopupSet {
  min-width: 1px;
}

/* Identity UI */
#identity-popup-content-box.unknownIdentity > #identity-popup-connectedToLabel ,
#identity-popup-content-box.unknownIdentity > #identity-popup-runByLabel ,
#identity-popup-content-box.unknownIdentity > #identity-popup-content-host ,
#identity-popup-content-box.unknownIdentity > #identity-popup-content-owner ,
#identity-popup-content-box.verifiedIdentity > #identity-popup-connectedToLabel2 ,
#identity-popup-content-box.verifiedDomain > #identity-popup-connectedToLabel2 {
  display: none;
}

/*  Full Screen UI */
#fullscr-toggler {
  display: none;
  min-height: 5px;
  height: 5px;
}

#navigator-toolbox[inFullscreen="true"] > #fullscr-toggler,
#nav-bar[mode="text"] > #window-controls > toolbarbutton > .toolbarbutton-icon {
  display: -moz-box;
}

#nav-bar[mode="text"] > #window-controls > toolbarbutton > .toolbarbutton-text {
  display: none;
}

/* ::::: Keyboard UI Panel ::::: */
.KUI-panel-closebutton {
  -moz-binding: url("chrome://global/content/bindings/toolbarbutton.xml#toolbarbutton-image");
}

.ctrlTab-preview > html|canvas,
.allTabs-preview > html|canvas {
  min-width: inherit;
  max-width: inherit;
  min-height: inherit;
  max-height: inherit;
}

.ctrlTab-favicon-container,
.allTabs-favicon-container {
  -moz-box-align: start;
%ifdef XP_MACOSX
  -moz-box-pack: end;
%else
  -moz-box-pack: start;
%endif
}

.ctrlTab-favicon,
.allTabs-favicon {
  width: 16px;
  height: 16px;
}

/* ::::: Ctrl-Tab Panel ::::: */
.ctrlTab-preview {
  -moz-binding: url("chrome://browser/content/browser-tabPreviews.xml#ctrlTab-preview");
}

/* ::::: All Tabs Panel ::::: */
.allTabs-preview {
  -moz-binding: url("chrome://browser/content/browser-tabPreviews.xml#allTabs-preview");
}

#allTabs-tab-close-button {
  -moz-binding: url("chrome://global/content/bindings/toolbarbutton.xml#toolbarbutton-image");
  margin: 0;
}