diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 36ce385a..8606964b 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -691,9 +691,9 @@
     "message": "Search contents",
     "description": "Label for the search filter textbox on the Manage styles page"
   },
-  "searchStylesTooltip": {
-    "message": "To show styles for a URL, prefix it with 'url:'\nFor example, url:https://github.com/openstyles/stylus",
-    "description": "Label for the search filter textbox on the Manage styles page"
+  "searchStylesHelp": {
+    "message": "</> key focuses the search field.\nPlain text: search within the name, code, homepage URL and sites it is applied to. Words with less than 3 letters are ignored.\nMatching URL: prefix the search with <url:>, e.g. <url:https://github.com/openstyles/stylus>\nRegular expressions: include slashes and flags, e.g. </foo.*?/simguy>\nExact words: wrap the query in double quotes, e.g. <\"Like this!\">",
+    "description": "Text in the minihelp displayed when clicking (i) icon to the right of the search input field on the Manage styles page"
   },
   "sectionAdd": {
     "message": "Add another section",
diff --git a/js/messaging.js b/js/messaging.js
index 47c8900b..0936870c 100644
--- a/js/messaging.js
+++ b/js/messaging.js
@@ -286,9 +286,9 @@ function tryCatch(func, ...args) {
 }
 
 
-function tryRegExp(regexp) {
+function tryRegExp(regexp, flags) {
   try {
-    return new RegExp(regexp);
+    return new RegExp(regexp, flags);
   } catch (e) {}
 }
 
diff --git a/manage.html b/manage.html
index cb4793be..d9fa2f40 100644
--- a/manage.html
+++ b/manage.html
@@ -237,10 +237,12 @@
       <span i18n-text="manageOnlyUpdates"></span>
     </label>
 
-    <input id="search" type="search" i18n-placeholder="searchStyles" spellcheck="false"
-           i18n-title="searchStylesTooltip"
-           data-filter=":not(.not-matching)"
-           data-filter-hide=".not-matching">
+    <div id="search-wrapper">
+      <input id="search" type="search" i18n-placeholder="searchStyles" spellcheck="false"
+             data-filter=":not(.not-matching)"
+             data-filter-hide=".not-matching">
+      <svg id="search-help" class="svg-icon info"><use xlink:href="#svg-icon-help"/></svg>
+    </div>
 
   </details>
 
@@ -292,10 +294,11 @@
         <label for="manage.newUI.favicons" i18n-text="manageFavicons">
           <input id="manage.newUI.favicons" type="checkbox">
           <svg class="svg-icon checked"><use xlink:href="#svg-icon-checked"/></svg>
+          <svg class="svg-icon select-arrow" data-toggle-on-click="#faviconsHelp">
+            <title i18n-text="optionsSubheading"></title>
+            <use xlink:href="#svg-icon-select-arrow"/>
+          </svg>
         </label>
-        <svg class="svg-icon info" viewBox="0 0 14 16" i18n-alt="helpAlt" data-toggle-on-click="#faviconsHelp">
-          <path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path>
-        </svg>
         <div id="faviconsHelp" class="hidden" i18n-text="manageFaviconsHelp">
           <div>
             <label for="manage.newUI.faviconsGray" i18n-text="manageFaviconsGray">
@@ -348,6 +351,11 @@
   <symbol id="svg-icon-select-arrow" viewBox="0 0 1792 1792">
     <path fill-rule="evenodd" d="M1408 704q0 26-19 45l-448 448q-19 19-45 19t-45-19l-448-448q-19-19-19-45t19-45 45-19h896q26 0 45 19t19 45z"/>
   </symbol>
+
+  <symbol id="svg-icon-help" viewBox="0 0 14 16">
+    <title i18n-text="helpAlt"></title>
+    <path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path>
+  </symbol>
 </svg>
 
 </body>
diff --git a/manage/filters.js b/manage/filters.js
index c4c587ec..87ad4f0a 100644
--- a/manage/filters.js
+++ b/manage/filters.js
@@ -1,4 +1,4 @@
-/* global installed */
+/* global installed messageBox */
 'use strict';
 
 const filtersSelector = {
@@ -31,6 +31,25 @@ onDOMready().then(onBackgroundReady).then(() => {
   if (urlFilterParam) {
     $('#search').value = 'url:' + urlFilterParam;
   }
+  $('#search-help').onclick = () => {
+    messageBox({
+      className: 'help-text',
+      title: t('searchStyles'),
+      contents:
+        $create('ul',
+          t('searchStylesHelp').split('\n').map(line =>
+            $create('li', line.split(/(<.*?>)/).map((s, i, words) => {
+              if (s.startsWith('<')) {
+                const num = words.length;
+                const className = i === num - 2 && !words[num - 1] ? '.last' : '';
+                return $create('mark' + className, s.slice(1, -1));
+              } else {
+                return s;
+              }
+            })))),
+      buttons: [t('confirmOK')],
+    });
+  };
 
   $$('select[id$=".invert"]').forEach(el => {
     const slave = $('#' + el.id.replace('.invert', ''));
@@ -350,10 +369,11 @@ function showFiltersStats() {
 
 function searchStyles({immediately, container}) {
   const searchElement = $('#search');
-  const urlMode = /^\s*url:/i.test(searchElement.value);
+  const value = searchElement.value;
+  const urlMode = /^\s*url:/i.test(value);
   const query = urlMode
-    ? searchElement.value.replace(/^\s*url:/i, '').trim()
-    : searchElement.value.toLocaleLowerCase();
+    ? value.replace(/^\s*url:/i, '').trim()
+    : value.toLocaleLowerCase();
   const queryPrev = searchElement.lastValue || '';
   if (query === queryPrev && !immediately && !container) {
     return;
@@ -364,6 +384,12 @@ function searchStyles({immediately, container}) {
   }
   searchElement.lastValue = query;
 
+  const trimmed = query.trim();
+  const rx = trimmed.startsWith('/') && trimmed.indexOf('/', 1) > 0 &&
+    tryRegExp(...(value.match(/^\s*\/(.*?)\/([gimsuy]*)\s*$/) || []).slice(1));
+  const words = rx ? null :
+    trimmed.startsWith('"') && trimmed.endsWith('"') ? [value.trim().slice(1, -1)] :
+      query.split(/\s+/).filter(s => s.length > 2);
   const searchInVisible = !urlMode && queryPrev && query.includes(queryPrev);
   const entries = container && container.children || container ||
     (searchInVisible ? $$('.entry:not(.hidden)') : installed.children);
@@ -415,6 +441,17 @@ function searchStyles({immediately, container}) {
   }
 
   function isMatchingText(text) {
-    return text.toLocaleLowerCase().indexOf(query) >= 0;
+    if (rx) {
+      return rx.test(text);
+    }
+    for (let pass = 1; pass <= 2; pass++) {
+      for (const word of words) {
+        if (text.includes(word)) {
+          return true;
+        }
+      }
+      text = text.toLocaleLowerCase();
+    }
+    return false;
   }
 }
diff --git a/manage/manage.css b/manage/manage.css
index 0de5b53b..e3e8e476 100644
--- a/manage/manage.css
+++ b/manage/manage.css
@@ -658,6 +658,7 @@ select {
   align-items: center;
   margin-bottom: auto;
   flex-wrap: wrap;
+  position: relative;
 }
 
 #newUIoptions input[type="number"] {
@@ -665,6 +666,18 @@ select {
   margin-right: .5em;
 }
 
+#newUIoptions [data-toggle-on-click] {
+  transform: rotate(-90deg);
+  cursor: pointer;
+  right: -16px;
+  top: 0;
+  pointer-events: auto;
+}
+
+#newUIoptions [data-toggle-on-click][open] {
+  transform: none;
+}
+
 input[id^="manage.newUI"] {
   margin-left: 0;
 }
@@ -763,7 +776,6 @@ input[id^="manage.newUI"] {
   display: none !important;
 }
 
-#filters input,
 #filters label {
   display: flex;
   align-items: center;
@@ -816,14 +828,48 @@ input[id^="manage.newUI"] {
   display: none;
 }
 
+#search-wrapper {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+}
+
 #search {
-  width: calc(100% - 4px);
+  flex-grow: 1;
   margin: 0.25rem 0 0;
-  border-radius: 0.25rem;
   padding-left: 0.25rem;
   border-width: 1px;
 }
 
+#search-wrapper .info {
+  margin: 4px -5px 0 8px;
+}
+
+#message-box.help-text > div {
+  max-width: 26rem;
+}
+.help-text li:not(:last-child) {
+  margin-bottom: 1em;
+}
+
+.help-text mark {
+  background-color: rgba(128, 128, 128, .15);
+  color: currentColor;
+  padding: 2px 6px;
+  font-weight: bold;
+  font-family: monospace;
+  border: 1px solid rgba(128, 128, 128, .25);
+  display: inline-block;
+  margin: 2px;
+}
+
+.help-text mark.last {
+  display: block;
+  width: -moz-min-content;
+  width: min-content;
+  white-space: nowrap;
+}
+
 #import ul {
   margin-left: 0;
   padding-left: 0;
diff --git a/manage/manage.js b/manage/manage.js
index 58435e1c..4069337a 100644
--- a/manage/manage.js
+++ b/manage/manage.js
@@ -66,7 +66,15 @@ function initGlobalEvents() {
   $$('[data-toggle-on-click]').forEach(el => {
     // dataset on SVG doesn't work in Chrome 49-??, works in 57+
     const target = $(el.getAttribute('data-toggle-on-click'));
-    el.onclick = () => target.classList.toggle('hidden');
+    el.onclick = event => {
+      event.preventDefault();
+      target.classList.toggle('hidden');
+      if (target.classList.contains('hidden')) {
+        el.removeAttribute('open');
+      } else {
+        el.setAttribute('open', '');
+      }
+    };
   });
 
   // triggered automatically by setupLivePrefs() below