gecko-dev/toolkit/content/autocomplete.css

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

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

/* Apply crisp rendering for favicons at exactly 2dppx resolution */
@media (resolution: 2dppx) {
  .ac-site-icon {
    image-rendering: -moz-crisp-edges;
  }
}

richlistitem {
  -moz-box-orient: horizontal;
  overflow: hidden;
}

.ac-title-text,
.ac-tags-text,
.ac-url-text,
.ac-action-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ac-tags[empty] {
  display: none;
}

.ac-action[actiontype=searchengine]:not([selected]),
.ac-separator[actiontype=searchengine]:not([selected]) {
  display: none;
}

.ac-separator[type=keyword] {
  display: none;
}