diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 85f0a5ab..fd952999 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -762,6 +762,9 @@
     "message": "Number of applies-to items",
     "description": "Label for the numeric input box to limit max number of applies-to targets in the new UI on manage page"
   },
+  "manageMinColumnWidth": {
+    "message": "Minimum column width (in pixels; 9999 disables multi-column mode)"
+  },
   "manageNewStyleAsUsercss": {
     "message": "as Usercss",
     "description": "VERY SHORT label for the checkbox next to the 'Write new style' button in the style manager"
diff --git a/injection-order/injection-order.js b/injection-order/injection-order.js
index f7827db5..5a9de839 100644
--- a/injection-order/injection-order.js
+++ b/injection-order/injection-order.js
@@ -37,7 +37,7 @@ async function InjectionOrder(show, el, selector) {
     parts.name.href = '/edit.html?id=' + style.id;
     parts.name.textContent = style.name;
     return Object.assign(entry.cloneNode(true), {
-      styleNameLowerCase: style.name.toLocaleLowerCase(),
+      styleNameLC: style.name.toLocaleLowerCase(),
     });
   }
 
diff --git a/js/dom.js b/js/dom.js
index 7e1c1d22..1237f6b9 100644
--- a/js/dom.js
+++ b/js/dom.js
@@ -314,9 +314,7 @@ function setupLivePrefs(ids) {
   function getValue(el) {
     const type = el.dataset.valueType || el.type;
     return type === 'checkbox' ? el.checked :
-      // https://stackoverflow.com/questions/18062069/why-does-valueasnumber-return-nan-as-a-value
-      // valueAsNumber is not applicable for input[text/radio] or select
-      type === 'number' ? Number(el.value) :
+      type === 'number' ? parseFloat(el.value) :
       el.value;
   }
   function isSame(el, oldValue, value) {
@@ -465,6 +463,7 @@ prefs.ready.then(() => {
         const max = (innerWidth < 850 ? screen.availWidth : innerWidth) / 3;
         width = Math.round(Math.max(200, Math.min(max, Number(width) || 0)));
         $.root.style.setProperty('--header-width', width + 'px');
+        dom.HWval = width;
         return width;
       },
     });
diff --git a/js/prefs.js b/js/prefs.js
index 5ef033e9..d130122b 100644
--- a/js/prefs.js
+++ b/js/prefs.js
@@ -55,6 +55,7 @@
     'manage.actions.expanded': true,
     'manage.backup.expanded': true,
     'manage.filters.expanded': true,
+    'manage.minColumnWidth': 750,
     // the new compact layout doesn't look good on Android yet
     'manage.newUI': true,
     'manage.newUI.favicons': false, // show favicons for the sites in applies-to
diff --git a/manage.html b/manage.html
index a05b528c..710cc120 100644
--- a/manage.html
+++ b/manage.html
@@ -18,6 +18,8 @@
         <a target="_blank" class="homepage"></a>
       </h2>
       <p class="applies-to">
+        <span class="style-info" data-type="age"></span>.
+        <label i18n="genericSize">:</label><span class="style-info" data-type="size"></span>.
         <label i18n="appliesDisplay"></label>
         <span class="targets"></span>
       </p>
@@ -29,10 +31,8 @@
         <button class="disable" i18n="disableStyleLabel"></button>
         <button class="delete" i18n="deleteStyleLabel"></button>
         <button class="check-update" i18n="checkForUpdate"></button>
-        <button class="update" i18n="installUpdate"></button>
+        <button class="update" i18n="installUpdate" hidden></button>
         <button class="configure-usercss" i18n="configureStyle"></button>
-        <span class="style-info" data-type="size"></span>
-        <span class="style-info" data-type="age"></span>
         <span class="update-note"></span>
       </p>
     </div>
@@ -49,9 +49,9 @@
           &nbsp;
           <span class="style-info" data-type="version"></span>
         </a>
+        <a target="_blank" class="homepage" tabindex="0"></a>
       </h2>
       <p class="actions">
-        <a target="_blank" class="homepage" tabindex="0"></a>
         <a class="delete" i18n="title:deleteStyleLabel" tabindex="0">
           <svg class="svg-icon" viewBox="0 0 20 20">
             <polygon points="16.2,5.5 14.5,3.8 10,8.3 5.5,3.8 3.8,5.5 8.3,10 3.8,14.5
@@ -391,6 +391,7 @@
 </template>
 
 <link rel="stylesheet" href="manage/manage.css">
+<link rel="stylesheet" href="manage/manage-newui.css" id="newUI">
 <script src="js/dark-themer.js"></script> <!-- must be last in HEAD to avoid FOUC -->
 </head>
 
diff --git a/manage/events.js b/manage/events.js
index 4f89af82..09dbb1f9 100644
--- a/manage/events.js
+++ b/manage/events.js
@@ -130,7 +130,9 @@ const Events = {
   },
 
   name(event, entry) {
-    if (newUI.enabled) Events.edit(event, entry);
+    if (newUI.enabled && !event.target.closest('.homepage')) {
+      Events.edit(event, entry);
+    }
   },
 
   toggle(event, entry) {
@@ -193,7 +195,7 @@ function handleUpdate(style, {reason, method} = {}) {
   }
   entry = entry || createStyleElement(styleToDummyEntry(style));
   if (oldEntry) {
-    if (oldEntry.styleNameLowerCase === entry.styleNameLowerCase) {
+    if (oldEntry.styleNameLC === entry.styleNameLC) {
       installed.replaceChild(entry, oldEntry);
     } else {
       oldEntry.remove();
diff --git a/manage/incremental-search.js b/manage/incremental-search.js
index f0b1e01f..2fa7fc91 100644
--- a/manage/incremental-search.js
+++ b/manage/incremental-search.js
@@ -57,7 +57,7 @@
     let found;
     for (const entry of rotated || entries) {
       if (entry.classList.contains('hidden')) continue;
-      const name = entry.styleNameLowerCase;
+      const name = entry.styleNameLC;
       const pos = name.indexOf(text);
       if (pos === 0) {
         found = entry;
@@ -73,7 +73,7 @@
     if (found && found !== focusedEntry) {
       focusedEntry = found;
       focusedLink = $('a', found);
-      focusedName = found.styleNameLowerCase;
+      focusedName = found.styleNameLC;
       scrollElementIntoView(found, {invalidMarginRatio: .25});
       animateElement(found, 'highlight-quick');
       replaceInlineStyle({
diff --git a/manage/manage-newui.css b/manage/manage-newui.css
new file mode 100644
index 00000000..ebb81fa2
--- /dev/null
+++ b/manage/manage-newui.css
@@ -0,0 +1,278 @@
+.disabled.entry .svg-icon {
+  color: var(--c50);
+  fill: var(--c80);
+  font-weight: normal;
+  transition: color .5s .1s, fill .5s .1s;
+}
+#installed {
+  margin-top: .75rem;
+  margin-bottom: .75rem;
+}
+.entry {
+  padding: 0 .5em;
+  display: flex;
+  border: none;
+}
+.entry.odd {
+  background-color: rgba(128, 128, 128, 0.05);
+}
+.entry > * {
+  padding: .5rem 0;
+  margin: 0;
+  display: flex;
+  align-items: center;
+}
+.entry .actions {
+  position: relative;
+}
+.style-info[data-type=size],
+.style-info[data-type=age] {
+  color: var(--c50);
+  justify-content: end;
+}
+.style-info[data-type=age] {
+  flex: 0 0 4ch;
+}
+.style-info[data-type=size] {
+  flex: 0 0 var(--size-width);
+}
+.style-info[data-type=version] {
+  color: var(--c40);
+  padding-left: .5em;
+  font-weight: normal;
+}
+.style-info[data-type=version][data-is-date],
+.style-info[data-type=version][data-value=""],
+.style-info[data-type=version][data-value="1.0.0"] {
+  display: none;
+}
+.entry input[type="checkbox"]:not(.slider) {
+  pointer-events: all;
+}
+.style-name {
+  font-size: 14px;
+  padding-left: var(--name-padding-left);
+  position: relative;
+  cursor: pointer;
+  justify-content: space-between;
+  flex: 0 0 var(--name-width);
+  min-width: 25%;
+  max-width: 50%;
+}
+#installed[style*="--num-targets:0"] .style-name {
+  max-width: none;
+  flex-grow: 1;
+}
+.checkmate {
+  flex-shrink: 0;
+}
+.style-name-link {
+  width: 100%;
+}
+.entry .style-name:hover::before {
+  content: "";
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: linear-gradient(to right, hsla(180, 50%, 30%, 0.2), hsla(180, 20%, 10%, 0.05) 50%, transparent);
+  pointer-events: none;
+}
+.entry.enabled .style-name:hover .style-name-link {
+  color: var(--accent-1);
+}
+.homepage {
+  margin-top: -3px;
+}
+.actions {
+  flex: 0 0 calc(3 * (var(--action-size) + var(--action-margin)));
+  flex-wrap: nowrap;
+  z-index: 100;
+}
+.actions > * {
+  width: var(--action-size);
+  height: var(--action-size);
+  display: flex;
+  align-items: center;
+}
+.updater-icons > * {
+  transition: opacity 1s;
+  display: none;
+}
+.entry .svg-icon {
+  fill: var(--c60);
+}
+.entry:hover .svg-icon {
+  fill: var(--c40);
+}
+.entry .svg-icon.checked,
+.entry:hover .svg-icon.checked,
+.entry:hover .svg-icon:hover {
+  fill: var(--fg);
+}
+.checking-update .check-update {
+  opacity: 0;
+  display: inline-block;
+  pointer-events: none;
+}
+.can-update .update,
+.no-update:not(.update-problem):not(.update-done) .up-to-date,
+.no-update.update-problem .check-update,
+.update-done .updated {
+  display: inline-block;
+}
+.up-to-date svg,
+.updated svg {
+  cursor: auto;
+}
+.update-done .updated svg {
+  top: -4px;
+  position: relative;
+  filter: drop-shadow(0 5px 0 currentColor);
+}
+.can-update .update,
+.no-update.update-problem .check-update {
+  cursor: pointer;
+}
+.can-update[data-details$="locally edited"] .update svg,
+.update-problem .check-update svg {
+  fill: #ef6969;
+}
+.can-update[data-details$="locally edited"]:hover .update svg,
+.entry.update-problem:hover .check-update svg {
+  fill: #fd4040;
+}
+.can-update[data-details$="locally edited"]:hover .update svg:hover,
+.entry.update-problem:hover .check-update svg:hover {
+  fill: red;
+}
+.updater-icons > :not(.check-update):after {
+  content: attr(title);
+  position: absolute;
+  display: block;
+  width: max-content;
+  max-width: 25vw;
+  padding: 1ex 1.5ex;
+  border: 1px solid #ded597;
+  background-color: #fffbd6;
+  border-radius: 4px;
+  box-shadow: 2px 3px 10px rgba(0,0,0,.25);
+  font-size: 90%;
+  animation: fadeout 10s;
+  animation-fill-mode: both;
+}
+.update-problem .check-update:after {
+  background-color: red;
+  border: 1px solid #d40000;
+  color: white;
+  animation: none;
+}
+.can-update .update:after {
+  animation: none;
+}
+.can-update:not([data-details$="locally edited"]) .update:after {
+  background-color: #c0fff0;
+  border: 1px solid #89cac9;
+}
+.applies-to {
+  padding: .25em 0 .25em 1em;
+  flex-grow: 999;
+}
+#installed[style*="--num-targets:0"] .applies-to {
+  display: none;
+}
+.targets {
+  overflow: hidden;
+  max-height: calc(var(--num-targets) * 18px);
+  width: 100%;
+}
+.applies-to.expanded .targets {
+  max-height: none;
+}
+.target {
+  display: block;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  padding-right: 1em;
+  line-height: 18px;
+  width: 0;
+  min-width: 100%;
+  box-sizing: border-box;
+}
+.applies-to:not(.has-more) .expander {
+  display: none;
+}
+.target:hover {
+  background-color: inherit;
+}
+.target img {
+  width: 16px;
+  height: 16px;
+  vertical-align: middle;
+  margin: -1px 4px 0 -20px;
+  transition: opacity .5s, filter .5s;
+  /* workaround for the buggy CSS filter: images in the hidden overflow are shown on Mac */
+  backface-visibility: hidden;
+  visibility: hidden;
+}
+.favicons-grayed .target img {
+  filter: grayscale(1);
+  opacity: .25;
+}
+.has-favicons .target {
+  padding-left: 20px;
+}
+.has-favicons .target img[src] {
+  visibility: visible;
+}
+.entry:hover .target img {
+  opacity: 1;
+  filter: none;
+}
+.target b::after {
+  content: '?';
+  margin: -2px 4px 0 -20px;
+  display: inline-block;
+  vertical-align: baseline;
+  background: var(--c85);
+  width: 16px;
+  line-height: 16px;
+  text-align: center;
+  border-radius: 50%;
+  color: var(--bg);
+}
+@media (max-width: 850px) {
+  .entry {
+    padding: 0;
+  }
+  .entry .checkmate {
+    position: absolute;
+    left: 14px;
+    top: 0;
+    bottom: 0;
+    margin: auto;
+  }
+  .entry .style-name {
+    text-indent: unset;
+  }
+  .entry .actions {
+    width: 104px;
+    padding: .5rem 0 .5rem 6px;
+  }
+  .entry .applies-to {
+    padding: .25rem .5rem .25rem 0;
+  }
+  .entry .target {
+    max-width: 100%;
+    padding-right: 0;
+  }
+  .style-name-link::after {
+    text-indent: 0;
+    display: inline-block;
+  }
+  .entry > .style-info {
+    display: none;
+  }
+}
diff --git a/manage/manage.css b/manage/manage.css
index 3009c7a1..a7b7d670 100644
--- a/manage/manage.css
+++ b/manage/manage.css
@@ -1,7 +1,9 @@
 :root {
   --name-padding-left: 20px;
-  --name-padding-right: 40px;
-  --actions-width: 75px;
+  --name-width: 30ch;
+  --size-width: 4ch;
+  --action-size: 20px;
+  --action-margin: 6px;
 }
 body {
   /* Fill the entire viewport to enable json import via drag'n'drop */
@@ -124,17 +126,21 @@ a:hover {
 }
 
 #installed {
-  position: relative;
   padding-left: var(--header-width);
   box-sizing: border-box;
   width: 100%;
   align-self: start;
+  display: flex;
+  flex-wrap: wrap;
 }
 
 .entry {
   margin: 0;
   padding: 1.25em 2em;
   border-top: 1px solid var(--c85);
+  box-sizing: border-box;
+  position: relative;
+  width: calc(100% / var(--columns, 1));
 }
 
 .entry:first-child {
@@ -158,15 +164,13 @@ a:hover {
   margin-top: .25em;
   overflow-wrap: break-word;
 }
-
 .style-name a, .style-edit-link {
   text-decoration: none;
 }
-
+.style-name span,
 .applies-to {
-  overflow-wrap: break-word;
+  overflow-wrap: anywhere;
 }
-
 .applies-to,
 .actions {
   padding-left: 15px;
@@ -181,11 +185,10 @@ a:hover {
 
 .actions > * {
   margin-bottom: .25rem;
-  display: inline-block;
 }
 
 .actions > *:not(:last-child) {
-  margin-right: .25rem;
+  margin-right: var(--action-margin);
 }
 
 .applies-to label {
@@ -240,8 +243,7 @@ a:hover {
 }
 
 .disabled h2 .style-name-link,
-.disabled .applies-to,
-.newUI .disabled.entry .svg-icon {
+.disabled .applies-to {
   color: var(--c50);
   fill: var(--c80);
   font-weight: normal;
@@ -319,56 +321,8 @@ a:hover {
 
 /* compact layout */
 
-.newUI #installed {
-  display: table;
-  margin-top: .75rem;
-  margin-bottom: .75rem;
-}
-
-.newUI .entry {
-  display: table-row;
-  padding-top: 0;
-  padding-bottom: 0;
-}
-
-.newUI .entry.odd {
-  background-color: rgba(128, 128, 128, 0.05);
-}
-
-.newUI .entry > * {
-  padding: .5rem 0;
-  margin: 0;
-  display: table-cell;
-  vertical-align: middle;
-}
-
-.newUI .entry .actions {
-  position: relative;
-}
-
-.style-info[data-type=version] {
-  color: var(--c40);
-  padding-left: .5em;
-  font-weight: normal;
-}
-.newUI .style-info[data-type=version][data-is-date],
-.newUI .style-info[data-type=version][data-value=""],
-.newUI .style-info[data-type=version][data-value="1.0.0"] {
-  display: none;
-}
-.newUI .entry .style-info[data-type=size],
-.newUI .entry .style-info[data-type=age] {
-  color: var(--c50);
-  text-align: right;
-  padding-right: 1em;
-}
-
 /************ checkbox & select************/
 
-#newUIoptions > div, #newUIoptions > label {
-  margin: 4px 0;
-}
-
 .filter-selection {
   position: relative;
   left: -9px;
@@ -393,10 +347,6 @@ a:hover {
   margin-top: -2px;
 }
 
-.newUI #newUIoptions > label {
-  padding-left: 0;
-}
-
 .filter-selection select {
   height: 18px;
   border: none;
@@ -439,7 +389,7 @@ a:hover {
 
 .entry .checkmate {
   vertical-align: middle;
-  margin: -2px 1ex 0 0;
+  margin-right: 1ch;
 }
 
 #manage-text {
@@ -456,179 +406,10 @@ a:hover {
   margin: 0 .5em;
 }
 
-.newUI .entry input[type="checkbox"]:not(.slider) {
-  pointer-events: all;
-}
-
-.newUI .style-name {
-  font-size: 14px;
-  padding-left: var(--name-padding-left);
-  padding-right: var(--name-padding-right);
-  position: relative;
-  cursor: pointer;
-}
-
-.newUI .entry .style-name:hover::before {
-  content: "";
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  bottom: 0;
-  background: linear-gradient(to right, hsla(180, 50%, 30%, 0.2), hsla(180, 20%, 10%, 0.05) 50%, transparent);
-  pointer-events: none;
-}
-
-.newUI .entry.enabled .style-name:hover .style-name-link {
-  color: var(--accent-1);
-}
-
-.newUI .style-name:after {
-  text-indent: 1.2rem;
-}
-
-.newUI .actions:after {
-  text-indent: -25px;
-}
-
-.newUI .actions .homepage[href=""] {
-  display: inline-block;
-  visibility: hidden;
-  height: 0;
-}
-
-.newUI .actions {
-  width: var(--actions-width);
-  height: 20px;
-  white-space: nowrap;
-}
-
-.newUI .actions > * {
-  margin: 0 6px 0 0;
-  width: 20px;
-  height: 20px;
-}
-
-.newUI .updater-icons > * {
-  transition: opacity 1s;
-  display: none;
-}
-
-.newUI .entry .svg-icon {
-  fill: var(--c60);
-}
-
-.newUI .entry:hover .svg-icon {
-  fill: var(--c40);
-}
-
-button .svg-icon,
-.newUI .entry .svg-icon.checked,
-.newUI .entry:hover .svg-icon.checked,
-.newUI .entry:hover .svg-icon:hover {
+button .svg-icon {
   fill: var(--fg);
 }
 
-.newUI .checking-update .check-update {
-  opacity: 0;
-  display: inline-block;
-  pointer-events: none;
-}
-
-.newUI .can-update .update,
-.newUI .no-update:not(.update-problem):not(.update-done) .up-to-date,
-.newUI .no-update.update-problem .check-update,
-.newUI .update-done .updated {
-  display: inline-block;
-}
-
-.newUI .up-to-date svg,
-.newUI .updated svg {
-  cursor: auto;
-}
-
-.newUI .update-done .updated svg {
-  top: -4px;
-  position: relative;
-  filter: drop-shadow(0 5px 0 currentColor);
-}
-
-.newUI .can-update .update,
-.newUI .no-update.update-problem .check-update {
-  cursor: pointer;
-}
-
-.newUI .can-update[data-details$="locally edited"] .update svg,
-.newUI .update-problem .check-update svg {
-  fill: #ef6969;
-}
-
-.newUI .can-update[data-details$="locally edited"]:hover .update svg,
-.newUI .entry.update-problem:hover .check-update svg {
-  fill: #fd4040;
-}
-
-.newUI .can-update[data-details$="locally edited"]:hover .update svg:hover,
-.newUI .entry.update-problem:hover .check-update svg:hover {
-  fill: red;
-}
-
-.newUI .actions {
-  z-index: 100;
-}
-
-.newUI .updater-icons > :not(.check-update):after {
-  content: attr(title);
-  position: absolute;
-  margin-top: 18px;
-  margin-left: -36px;
-  padding: 1ex 1.5ex;
-  border: 1px solid #ded597;
-  background-color: #fffbd6;
-  border-radius: 4px;
-  box-shadow: 2px 3px 10px rgba(0,0,0,.25);
-  font-size: 90%;
-  animation: fadeout 10s;
-  animation-fill-mode: both;
-}
-
-.newUI .update-problem .check-update:after {
-  background-color: red;
-  border: 1px solid #d40000;
-  color: white;
-  animation: none;
-}
-
-.newUI .can-update .update:after {
-  animation: none;
-}
-
-.newUI .can-update:not([data-details$="locally edited"]) .update:after {
-  background-color: #c0fff0;
-  border: 1px solid #89cac9;
-}
-
-.newUI .applies-to {
-  padding-top: .25rem;
-  padding-bottom: .25rem;
-}
-.newUI .targets {
-  overflow: hidden;
-  max-height: calc(var(--num-targets) * 18px);
-}
-.newUI .applies-to.expanded .targets {
-  max-height: none;
-}
-.newUI .target {
-  display: block;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-  max-width: calc(75vw - var(--header-width) - var(--actions-width) - var(--name-padding-left) - var(--name-padding-right) - 6rem);
-  box-sizing: border-box;
-  padding-right: 1rem;
-  line-height: 18px;
-}
 .expander {
   cursor: pointer;
   position: absolute;
@@ -643,54 +424,6 @@ button .svg-icon,
   transform: rotate(180deg);
   transform-origin: 8px 8px;
 }
-.newUI .applies-to:not(.has-more) .expander {
-  display: none;
-}
-.newUI .target:hover {
-  background-color: inherit;
-}
-
-.newUI .target img {
-  width: 16px;
-  height: 16px;
-  vertical-align: middle;
-  margin: -1px 4px 0 -20px;
-  transition: opacity .5s, filter .5s;
-  /* workaround for the buggy CSS filter: images in the hidden overflow are shown on Mac */
-  backface-visibility: hidden;
-  visibility: hidden;
-}
-
-.newUI .favicons-grayed .target img {
-  filter: grayscale(1);
-  opacity: .25;
-}
-
-.newUI .has-favicons .target {
-  padding-left: 20px;
-}
-
-.newUI .has-favicons .target img[src] {
-  visibility: visible;
-}
-
-.newUI .entry:hover .target img {
-  opacity: 1;
-  filter: none;
-}
-
-.newUI .target b::after {
-  content: '?';
-  margin: -2px 4px 0 -20px;
-  display: inline-block;
-  vertical-align: baseline;
-  background: var(--c85);
-  width: 16px;
-  line-height: 16px;
-  text-align: center;
-  border-radius: 50%;
-  color: var(--bg);
-}
 
 /* Default, no update buttons */
 .updater-icons .update,
@@ -1032,12 +765,6 @@ button .svg-icon,
   }
 }
 
-@media (max-width: 1000px) {
-  .newUI .entry > .style-info {
-    display: none;
-  }
-}
-
 @media (max-width: 850px) {
   :root {
     --name-padding-left: 34px;
@@ -1058,7 +785,7 @@ button .svg-icon,
     left: 3.75rem;
   }
 
-  html:not(.newUI) .applies-to {
+  .oldUI .applies-to {
     word-break: break-all;
   }
 
@@ -1066,10 +793,6 @@ button .svg-icon,
     table-layout: fixed;
   }
 
-  .newUI .entry .actions {
-    padding-right: 30px
-  }
-
   #search-wrapper,
   #sort-wrapper,
   #header summary {
@@ -1127,41 +850,6 @@ button .svg-icon,
     margin-top: 0;
     padding-bottom: .25rem;
   }
-
-  .newUI .entry {
-    padding: 0;
-  }
-
-  .newUI .entry .checkmate {
-    position: absolute;
-    left: 14px;
-    top: 0;
-    bottom: 0;
-    margin: auto;
-  }
-
-  .newUI .entry .style-name {
-    text-indent: unset;
-  }
-
-  .newUI .entry .actions {
-    width: 104px;
-    padding: .5rem 0 .5rem 6px;
-  }
-
-  .newUI .entry .applies-to {
-    padding: .25rem .5rem .25rem 0;
-  }
-
-  .newUI .entry .target {
-    max-width: 100%;
-    padding-right: 0;
-  }
-
-  .newUI .style-name-link::after {
-    text-indent: 0;
-    display: inline-block;
-  }
 }
 
 @supports (-moz-appearance: none) {
diff --git a/manage/manage.js b/manage/manage.js
index 21ad814e..8df0cd20 100644
--- a/manage/manage.js
+++ b/manage/manage.js
@@ -28,9 +28,16 @@ const newUI = {
 Object.assign(newUI, {
   ids: Object.keys(newUI),
   prefKeyForId: id => `manage.newUI.${id}`.replace(/\.enabled$/, ''),
+  readPrefs(dest = newUI, cb) {
+    for (const id of newUI.ids) {
+      const val = dest[id] = prefs.get(newUI.prefKeyForId(id));
+      if (cb) cb(id, val);
+    }
+  },
   renderClass: () => {
     $.rootCL.toggle('newUI', newUI.enabled);
     $.rootCL.toggle('oldUI', !newUI.enabled);
+    $('#newUI').media = newUI.enabled ? '' : '?';
   },
   hasFavs: () => newUI.enabled && newUI.favicons,
   badFavsKey: 'badFavs',
@@ -41,9 +48,7 @@ Object.assign(newUI, {
   },
 });
 // ...read the actual values
-for (const id of newUI.ids) {
-  newUI[id] = prefs.get(newUI.prefKeyForId(id));
-}
+newUI.readPrefs();
 newUI.renderClass();
 
 (async function init() {
diff --git a/manage/render.js b/manage/render.js
index 7ccf09c8..dda36747 100644
--- a/manage/render.js
+++ b/manage/render.js
@@ -3,7 +3,6 @@
 /* global URLS debounce getOwnTab isEmptyObj sessionStore stringAsRegExp */// toolbox.js
 /* global filterAndAppend */// filters.js
 /* global installed newUI */// manage.js
-/* global prefs */
 /* global sorter */
 /* global t */// localization.js
 'use strict';
@@ -18,6 +17,7 @@ const AGES = [
   [Infinity, 'y', t('dateAbbrYear', '\x01')],
 ];
 const groupThousands = num => `${num}`.replace(/\d(?=(\d{3})+$)/g, '$&\xA0');
+const renderSize = size => groupThousands(Math.round(size / 1024)) + 'k';
 
 (() => {
   const proto = HTMLImageElement.prototype;
@@ -79,7 +79,7 @@ function calcObjSize(obj) {
         Object.entries(obj).reduce((sum, [k, v]) => sum + k.length + calcObjSize(v), 0);
 }
 
-function createStyleElement({styleMeta: style, styleNameLowerCase: nameLC, styleSize: size}) {
+function createStyleElement({styleMeta: style, styleNameLC: nameLC, styleSize: size}) {
   // query the sub-elements just once, then reuse the references
   if ((elementParts || {}).newUI !== newUI.enabled) {
     const entry = t.template[newUI.enabled ? 'styleNewUI' : 'style'].cloneNode(true);
@@ -105,7 +105,6 @@ function createStyleElement({styleMeta: style, styleNameLowerCase: nameLC, style
       },
       oldConfigure: !newUI.enabled && $('.configure-usercss', entry),
       oldCheckUpdate: !newUI.enabled && $('.check-update', entry),
-      oldUpdate: !newUI.enabled && $('.update', entry),
     };
   }
   const parts = elementParts;
@@ -126,12 +125,11 @@ function createStyleElement({styleMeta: style, styleNameLowerCase: nameLC, style
   }
   createAgeText(parts.infoAge, style);
   parts.infoSize.dataset.value = Math.log10(size || 1) >> 0; // for CSS to target big/small styles
-  parts.infoSize.textContent = groupThousands(Math.round(size / 1024)) + 'k';
+  parts.infoSize.textContent = renderSize(size);
   parts.infoSize.title = `${t('genericSize')}: ${groupThousands(size)} B`;
   if (!newUI.enabled) {
     parts.oldConfigure.classList.toggle('hidden', !configurable);
     parts.oldCheckUpdate.classList.toggle('hidden', !style.updateUrl);
-    parts.oldUpdate.classList.toggle('hidden', !style.updateUrl);
   }
 
   // clear the code to free up some memory
@@ -142,7 +140,7 @@ function createStyleElement({styleMeta: style, styleNameLowerCase: nameLC, style
   const entry = parts.entry.cloneNode(true);
   entry.id = ENTRY_ID_PREFIX_RAW + style.id;
   entry.styleId = style.id;
-  entry.styleNameLowerCase = nameLC;
+  entry.styleNameLC = nameLC;
   entry.styleMeta = style;
   entry.styleSize = size;
   entry.className = parts.entryClassBase + ' ' +
@@ -166,6 +164,12 @@ function createStyleElement({styleMeta: style, styleNameLowerCase: nameLC, style
 }
 
 function createTargetsElement({entry, expanded, style = entry.styleMeta}) {
+  const maxTargets = expanded ? 1000 : newUI.enabled ? newUI.targets : 10;
+  if (!maxTargets) {
+    entry._numTargets = 0;
+    return;
+  }
+  const displayed = new Set();
   const entryTargets = $('.targets', entry);
   const expanderCls = $('.applies-to', entry).classList;
   const targets = elementParts.targets.cloneNode(true);
@@ -173,8 +177,6 @@ function createTargetsElement({entry, expanded, style = entry.styleMeta}) {
   let el = entryTargets.firstElementChild;
   let numTargets = 0;
   let allTargetsRendered = true;
-  const maxTargets = expanded ? 1000 : newUI.enabled ? newUI.targets : 10;
-  const displayed = new Set();
   for (const type of TARGET_TYPES) {
     for (const section of style.sections) {
       for (const targetValue of section[type] || []) {
@@ -352,26 +354,43 @@ function padLeft(val, width) {
   return ' '.repeat(Math.max(0, width - val.length)) + val;
 }
 
+function fitNameColumn(styles) {
+  const align = 1e9; // required by sort()
+  const lengths = styles.map(s => align +
+    (s = s.displayName || s.name || '').length +
+    s.replace(/[^\u3000-\uFE00]+/g, '').length).sort(); // CJK glyphs are twice as wide
+  const len = styles.length;
+  const fringe = len * 5 / 100 | 0; // ignoring 5% of outliers at each end
+  let avgName = 0;
+  for (let i = fringe; i < len - fringe; i++) {
+    avgName = Math.max(avgName, lengths[i] - align);
+  }
+  $.root.style.setProperty('--name-width', avgName + 'ch');
+}
+
+function fitSizeColumn(entries) {
+  const max = entries.reduce((res, e) => Math.max(res, e.styleSize), 0);
+  $.root.style.setProperty('--size-width', renderSize(max).length + 'ch');
+}
+
 function showStyles(styles = [], matchUrlIds) {
-  const sorted = sorter.sort(styles.map(styleToDummyEntry));
+  const dummies = styles.map(styleToDummyEntry);
+  const sorted = sorter.sort(dummies);
   let index = 0;
   let firstRun = true;
   installed.dataset.total = styles.length;
   const scrollY = (history.state || {}).scrollY;
   const shouldRenderAll = scrollY > window.innerHeight || sessionStore.justEditedStyleId;
   const renderBin = document.createDocumentFragment();
-  if (scrollY) {
-    renderStyles();
-  } else {
-    requestAnimationFrame(renderStyles);
-  }
+  fitNameColumn(styles);
+  fitSizeColumn(dummies);
+  renderStyles();
 
   function renderStyles() {
     const t0 = performance.now();
-    while (index < sorted.length && (shouldRenderAll || performance.now() - t0 < 20)) {
-      const info = sorted[index++];
-      const entry = createStyleElement(info);
-      if (matchUrlIds && !matchUrlIds.includes(info.style.id)) {
+    while (index < sorted.length && (shouldRenderAll || performance.now() - t0 < 50)) {
+      const entry = createStyleElement(sorted[index++]);
+      if (matchUrlIds && !matchUrlIds.includes(entry.styleMeta.id)) {
         entry.classList.add('not-matching');
       }
       renderBin.appendChild(entry);
@@ -398,7 +417,7 @@ function styleToDummyEntry(style) {
     styleMeta: style,
     styleSize: calcObjSize(style),
     // sort case-insensitively the whole list then sort dupes like `Foo` and `foo` case-sensitively
-    styleNameLowerCase: name.toLocaleLowerCase() + '\n' + name,
+    styleNameLC: name.toLocaleLowerCase() + '\n' + name,
   };
 }
 
@@ -407,13 +426,11 @@ function switchUI({styleOnly} = {}) {
   const current = {};
   const changed = {};
   let someChanged = false;
-  for (const id of newUI.ids) {
-    const value = prefs.get(newUI.prefKeyForId(id));
+  newUI.readPrefs(current, (id, value) => {
     const valueChanged = value !== newUI[id] && (id === 'enabled' || current.enabled);
-    current[id] = value;
     changed[id] = valueChanged;
     someChanged |= valueChanged;
-  }
+  });
 
   if (!styleOnly && !someChanged) {
     return;
diff --git a/manage/sorter.js b/manage/sorter.js
index c4d72802..66f355c8 100644
--- a/manage/sorter.js
+++ b/manage/sorter.js
@@ -1,4 +1,4 @@
-/* global $ $create messageBoxProxy */// dom.js
+/* global $ $create dom messageBoxProxy */// dom.js
 /* global installed */// manage.js
 /* global prefs */
 /* global t */// localization.js
@@ -6,6 +6,10 @@
 
 const sorter = (() => {
 
+  const COL_MIN = 300; // same as options.html
+  const COL_MAX = 9999; // same as options.html
+  const COL_PROP = '--columns';
+
   const sorterType = {
     alpha: (a, b) => a < b ? -1 : a === b ? 0 : 1,
     number: (a, b) => (a || 0) - (b || 0),
@@ -14,7 +18,7 @@ const sorter = (() => {
   const tagData = {
     title: {
       text: t('genericTitle'),
-      parse: v => v.styleNameLowerCase,
+      parse: v => v.styleNameLC,
       sorter: sorterType.alpha,
     },
     usercss: {
@@ -71,12 +75,13 @@ const sorter = (() => {
   const getPref = () => prefs.get(ID) || prefs.defaults[ID];
 
   let columns = 1;
+  let minWidth;
 
   function init() {
     prefs.subscribe(ID, sorter.update);
     $('#sorter-help').onclick = showHelp;
     addOptions();
-    updateColumnCount();
+    prefs.subscribe('manage.minColumnWidth', updateColumnWidth, {runNow: true});
   }
 
   function addOptions() {
@@ -172,21 +177,40 @@ const sorter = (() => {
   };
 
   function updateColumnCount() {
-    let newValue = 1;
-    for (let el = $.root.lastElementChild;
-         el.localName === 'style';
-         el = el.previousElementSibling) {
-      if (el.textContent.includes('--columns:')) {
-        newValue = Math.max(1, getComputedStyle($.root).getPropertyValue('--columns') | 0);
-        break;
-      }
-    }
-    if (columns !== newValue) {
-      columns = newValue;
+    const useStyle = [].some.call($.root.children,
+      el => el.tagName === 'STYLE' && el.textContent.includes(COL_PROP + ':'));
+    const v = useStyle ? Math.max(1, getComputedStyle($.root).getPropertyValue(COL_PROP) >> 0)
+      : minWidth ? onResize()
+        : columns;
+    if (columns !== v) {
+      columns = v;
       return true;
     }
   }
 
+  function updateColumnWidth(_, val) {
+    minWidth = Math.max(val, COL_MIN);
+    if (val < COL_MAX) {
+      window.on('resize', onResize);
+    } else {
+      window.off('resize', onResize);
+      $.root.style.removeProperty(COL_PROP);
+    }
+    sorter.updateStripes({onlyWhenColumnsChanged: true});
+  }
+
+  function onResize(evt) {
+    const c = Math.max(1, (window.innerWidth - dom.HWval) / minWidth >> 0);
+    if (columns !== c) {
+      $.root.style.setProperty(COL_PROP, c);
+      if (evt) {
+        columns = c;
+        sorter.updateStripes();
+      }
+    }
+    return c;
+  }
+
   async function showHelp(event) {
     event.preventDefault();
     messageBoxProxy.show({
diff --git a/options.html b/options.html
index b67394c4..12ec71e9 100644
--- a/options.html
+++ b/options.html
@@ -240,6 +240,10 @@
       <div class="block">
         <h1 i18n="openManage"></h1>
         <div class="items">
+          <label>
+            <span i18n="manageMinColumnWidth"></span>
+            <input id="manage.minColumnWidth" type="number" min="300" max="9999">
+          </label>
           <label>
             <span i18n="manageNewUI"></span>
             <span class="onoffswitch">
@@ -268,7 +272,7 @@
           </label>
           <label>
             <span i18n="manageMaxTargets"></span>
-            <input id="manage.newUI.targets" type="number" min="1" max="99">
+            <input id="manage.newUI.targets" type="number" min="0" max="99">
           </label>
         </div>
       </div>