gecko-dev/browser/themes/shared/urlbarSearchSuggestionsNotification.inc.css

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] {
  border-bottom: 1px solid var(--panel-separator-color);
  padding-inline-start: 0;
  padding-inline-end: 6px;
  min-height: 3em;
}

/* Limit the size of the hidden description, since a deck takes the size of the biggest child */
#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][selectedIndex="0"] #search-suggestions-hint,
#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][selectedIndex="1"] #search-suggestions-question {
  max-height: 5em;
}

/* Opt-in notification */

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] > hbox[anonid="search-suggestions-opt-in"] {
  padding: 6px 0;
  padding-inline-start: 44px;
  background-color: hsla(210, 4%, 10%, 0.07);
  background-image: url("chrome://browser/skin/info.svg");
  background-clip: padding-box;
  background-position: 20px center;
  background-repeat: no-repeat;
  background-size: 16px 16px;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] > hbox[anonid="search-suggestions-opt-in"]:-moz-locale-dir(rtl) {
  background-position: right 20px center;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] > hbox[anonid="search-suggestions-opt-in"] > description {
  margin: 0;
  padding: 0;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] > hbox[anonid="search-suggestions-opt-in"] > description > label.text-link {
  margin-inline-start: 0;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] button {
  -moz-appearance: none;
  min-width: 80px;
  border-radius: 3px;
  margin: 0;
  margin-inline-start: 10px;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] button[anonid="search-suggestions-notification-disable"] {
  color: hsl(210, 0%, 38%);
  background-color: hsl(210, 0%, 88%);
  border: 1px solid hsl(210, 0%, 82%);
}
#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] button[anonid="search-suggestions-notification-disable"]:hover {
  background-color: hsl(210, 0%, 84%);
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] button[anonid="search-suggestions-notification-enable"] {
  color: white;
  background-color: hsl(93, 82%, 44%);
  border: 1px solid hsl(93, 82%, 44%);
}
#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] button[anonid="search-suggestions-notification-enable"]:hover {
  background-color: hsl(93, 82%, 40%);
}

/* Opt-out hint */

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] > hbox[anonid="search-suggestions-opt-out"] {
  font: message-box;
  display: flex;
  flex-direction: row;
  align-items: center;
  flex-wrap: nowrap;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] hbox[anonid="search-suggestions-hint-box"] {
  flex-basis: 100%;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] hbox[anonid="search-suggestions-hint-box"] > description {
  margin: auto;
  padding: 4px 8px;
  background-color: #ffeebe;
  border: 1px solid #ffdf81;
  border-radius: 4px;
  color: #7d3500;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] hbox[anonid="search-suggestions-hint-box"] > description > html|span {
  unicode-bidi: embed;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] hbox[anonid="search-suggestions-hint-box"] > description > html|span.prefix {
  font-weight: bold;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][animate] > hbox[anonid="search-suggestions-opt-out"] > .ac-site-icon {
  transform: scale(0);
  animation-name: search-suggestions-hint-grow;
  animation-duration: 500ms;
  animation-delay: 500ms;
  animation-iteration-count: 1;
  animation-timing-function: ease-in-out;
  animation-fill-mode: forwards;
  min-width: 16px;
}

@keyframes search-suggestions-hint-grow {
  0%   { transform: scale(0); }
  40%  { transform: scale(1.5); }
  60%  { transform: scale(1); }
  80%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][animate] hbox[anonid="search-suggestions-hint-typing"] > .ac-title-text {
  text-overflow: clip;
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][animate] hbox[anonid="search-suggestions-hint-typing"] {
  overflow: hidden;
  max-width: 12ch;
  width: 0;
  animation-name: search-suggestions-hint-typing;
  animation-duration: 500ms;
  animation-delay: 750ms;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
}

@media all and (max-width: 800px) {
  /* Hide the typing animation block */
  #PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"] hbox[anonid="search-suggestions-hint-typing"] {
    display: none;
  }
}

@keyframes search-suggestions-hint-typing {
  from { width: 0; }
  to   { width: 12ch; }
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][animate] hbox[anonid="search-suggestions-hint-box"] {
  opacity: 0;
  animation-duration: 250ms;
  animation-delay: 1500ms;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
}

/* Margin-inline-start can't be animated yet */
#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][animate] hbox[anonid="search-suggestions-hint-box"]:-moz-locale-dir(ltr) {
  margin-left: 160px;
  animation-name: search-suggestions-hint-buildin-ltr;
}

@keyframes search-suggestions-hint-buildin-ltr {
  from  { margin-left: 160px; opacity: 0; }
  to    { margin-left: 0; opacity: 1; }
}

#PopupAutoCompleteRichResult > deck[anonid="search-suggestions-notification"][animate] hbox[anonid="search-suggestions-hint-box"]:-moz-locale-dir(rtl) {
  /* Should be margin-inline-start but that can't be animated yet */
  margin-right: 160px;
  animation-name: search-suggestions-hint-buildin-rtl;
}

@keyframes search-suggestions-hint-buildin-rtl {
  from  { margin-right: 160px; opacity: 0; }
  to    { margin-right: 0; opacity: 1; }
}

#search-suggestions-change-settings {
  opacity: 0;
  animation-name: search-suggestions-hint-fadein;
  animation-duration: 500ms;
  animation-delay: 1800ms;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
}

@keyframes search-suggestions-hint-fadein {
  from  { opacity: 0 }
  to    { opacity: 1 }
}