diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 39f194f3..fee1ee22 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -250,6 +250,13 @@
     "message": "Copy to clipboard",
     "description": "Tooltip for elements which can be copied"
   },
+  "customNameHint": {
+    "message": "Enter a custom name here to rename the style in UI without breaking its updates"
+  },
+  "customNameResetHint": {
+    "message": "Stop using customized name, switch to the style's own name",
+    "description": "Tooltip of 'x' button shown in editor when changing the name input of a) styles updated from a URL i.e. not locally created, b) UserCSS styles"
+  },
   "dateInstalled": {
     "message": "Date installed",
     "description": "Option text for the user to sort the style by install date"
diff --git a/background/search-db.js b/background/search-db.js
index 75318304..21ef0572 100644
--- a/background/search-db.js
+++ b/background/search-db.js
@@ -57,7 +57,7 @@
           continue;
         }
         for (const part in PARTS) {
-          const text = style[part];
+          const text = part === 'name' ? style.customName || style.name : style[part];
           if (text && PARTS[part](text, rx, words, icase)) {
             results.push(id);
             break;
diff --git a/background/style-manager.js b/background/style-manager.js
index 4ae2a5c2..44c215e0 100644
--- a/background/style-manager.js
+++ b/background/style-manager.js
@@ -61,6 +61,8 @@ const styleManager = (() => {
     username: ''
   };
 
+  const DELETE_IF_NULL = ['id', 'customName'];
+
   handleLivePreviewConnections();
 
   return Object.assign({
@@ -387,8 +389,10 @@ const styleManager = (() => {
     if (!style.name) {
       throw new Error('style name is empty');
     }
-    if (style.id == null) {
-      delete style.id;
+    for (const key of DELETE_IF_NULL) {
+      if (style[key] == null) {
+        delete style[key];
+      }
     }
     if (!style._id) {
       style._id = uuidv4();
@@ -569,6 +573,16 @@ const styleManager = (() => {
           touched = true;
         }
       }
+      // upgrade the old way of customizing local names
+      const {originalName} = style;
+      if (originalName) {
+        touched = true;
+        if (originalName !== style.name) {
+          style.customName = style.name;
+          style.name = originalName;
+        }
+        delete style.originalName;
+      }
       return touched;
     }
   }
diff --git a/background/update.js b/background/update.js
index 2a0e02a7..33c2022c 100644
--- a/background/update.js
+++ b/background/update.js
@@ -116,7 +116,7 @@
     }
 
     function reportSuccess(saved) {
-      log(STATES.UPDATED + ` #${style.id} ${style.name}`);
+      log(STATES.UPDATED + ` #${style.id} ${style.customName || style.name}`);
       const info = {updated: true, style: saved};
       if (port) port.postMessage(info);
       return info;
@@ -139,7 +139,7 @@
       if (typeof error === 'object' && error.message) {
         error = error.message;
       }
-      log(STATES.SKIPPED + ` (${error}) #${style.id} ${style.name}`);
+      log(STATES.SKIPPED + ` (${error}) #${style.id} ${style.customName || style.name}`);
       const info = {error, STATES, style: getStyleWithNoCode(style)};
       if (port) port.postMessage(info);
       return info;
@@ -207,13 +207,6 @@
       // keep current state
       delete json.enabled;
 
-      // keep local name customizations
-      if (style.originalName !== style.name && style.name !== json.name) {
-        delete json.name;
-      } else {
-        json.originalName = json.name;
-      }
-
       const newStyle = Object.assign({}, style, json);
       if (styleSectionsEqual(json, style, {checkSource: true})) {
         // update digest even if save === false as there might be just a space added etc.
diff --git a/edit.html b/edit.html
index b87396fe..5d7d0c00 100644
--- a/edit.html
+++ b/edit.html
@@ -18,6 +18,22 @@
       }
     </style>
 
+    <link id="cm-theme" rel="stylesheet">
+
+    <script src="js/polyfill.js"></script>
+    <script src="js/dom.js"></script>
+    <script src="js/messaging.js"></script>
+    <script src="js/msg.js"></script>
+    <script src="js/prefs.js"></script>
+    <script src="js/localization.js"></script>
+    <script src="js/script-loader.js"></script>
+    <script src="js/storage-util.js"></script>
+
+    <script src="content/style-injector.js"></script>
+    <script src="content/apply.js"></script>
+
+    <script src="edit/edit.js"></script> <!-- run it ASAP to send a request for the style -->
+
     <link  href="vendor/codemirror/lib/codemirror.css" rel="stylesheet">
     <script src="vendor/codemirror/lib/codemirror.js"></script>
 
@@ -63,44 +79,27 @@
 
     <script src="vendor-overwrites/codemirror-addon/match-highlighter.js"></script>
 
-    <script src="js/polyfill.js"></script>
-    <script src="js/dom.js"></script>
-    <script src="js/messaging.js"></script>
-    <script src="js/prefs.js"></script>
-    <script src="js/localization.js"></script>
-    <script src="js/script-loader.js"></script>
-    <script src="js/storage-util.js"></script>
-    <script src="js/msg.js"></script>
-    <script src="js/worker-util.js"></script>
-
-    <script src="content/style-injector.js"></script>
-    <script src="content/apply.js"></script>
-
-    <link  href="edit/global-search.css" rel="stylesheet">
-    <script src="edit/global-search.js"></script>
+    <script src="msgbox/msgbox.js" async></script>
 
     <link  href="edit/codemirror-default.css" rel="stylesheet">
     <script src="edit/codemirror-default.js"></script>
-
+    <script src="edit/codemirror-factory.js"></script>
     <script src="edit/util.js"></script>
     <script src="edit/regexp-tester.js"></script>
     <script src="edit/live-preview.js"></script>
     <script src="edit/applies-to-line-widget.js"></script>
     <script src="edit/reroute-hotkeys.js"></script>
-    <script src="edit/codemirror-factory.js"></script>
+    <link  href="edit/global-search.css" rel="stylesheet">
+    <script src="edit/global-search.js"></script>
     <script src="edit/colorpicker-helper.js"></script>
     <script src="edit/beautify.js"></script>
     <script src="edit/show-keymap-help.js"></script>
     <script src="edit/codemirror-themes.js"></script>
-
     <script src="edit/source-editor.js"></script>
     <script src="edit/sections-editor-section.js"></script>
     <script src="edit/sections-editor.js"></script>
 
-    <script src="edit/edit.js"></script>
-
-    <script src="msgbox/msgbox.js" async></script>
-
+    <script src="js/worker-util.js"></script>
     <script src="edit/linter.js"></script>
     <script src="edit/linter-defaults.js"></script>
     <script src="edit/linter-engines.js"></script>
@@ -109,8 +108,6 @@
     <script src="edit/linter-report.js"></script>
     <script src="edit/linter-config-dialog.js"></script>
 
-    <link id="cm-theme" rel="stylesheet">
-
     <template data-id="appliesTo">
       <li class="applies-to-item">
         <div class="select-resizer">
@@ -284,7 +281,13 @@
       <h1 id="heading">&nbsp;</h1> <!-- nbsp allocates the actual height which prevents page shift -->
       <section id="basic-info">
         <div id="basic-info-name">
-          <input id="name" class="style-contributor" spellcheck="false" required>
+          <input id="name" class="style-contributor" spellcheck="false">
+          <a id="reset-name" href="#" i18n-title="customNameResetHint" tabindex="0" hidden>
+            <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
+                               5.5,16.2 10,11.7 14.5,16.2 16.2,14.5 11.7,10 "/>
+            </svg>
+          </a>
           <a id="url" target="_blank"><svg class="svg-icon"><use xlink:href="#svg-icon-external-link"/></svg></a>
         </div>
         <div id="basic-info-enabled">
diff --git a/edit/codemirror-default.js b/edit/codemirror-default.js
index e83deeca..72dace8b 100644
--- a/edit/codemirror-default.js
+++ b/edit/codemirror-default.js
@@ -315,7 +315,7 @@ CodeMirror.hint && (() => {
     }
 
     // USO vars in usercss mode editor
-    const vars = editor.getStyle().usercssData.vars;
+    const vars = editor.style.usercssData.vars;
     const list = vars ?
       Object.keys(vars).filter(name => name.startsWith(leftPart)) : [];
     return {
@@ -343,7 +343,7 @@ CodeMirror.hint && (() => {
         string[start + 3] === '[' &&
         string[pos - 3] === ']' &&
         string[pos - 4] === ']') {
-      const vars = typeof editor !== 'undefined' && (editor.getStyle().usercssData || {}).vars;
+      const vars = typeof editor !== 'undefined' && (editor.style.usercssData || {}).vars;
       const name = vars && string.slice(start + 4, pos - 4);
       if (vars && Object.hasOwnProperty.call(vars, name.endsWith('-rgb') ? name.slice(0, -4) : name)) {
         token[0] = USO_VALID_VAR;
diff --git a/edit/edit.css b/edit/edit.css
index 54aeed44..9e385382 100644
--- a/edit/edit.css
+++ b/edit/edit.css
@@ -88,6 +88,9 @@ label {
   display: flex;
   align-items: center;
 }
+#reset-name {
+  margin: 0 .25em 0 .5em;
+}
 #url {
   margin-left: 0.25rem;
 }
@@ -610,7 +613,8 @@ body:not(.find-open) [data-match-highlight-count="1"] .CodeMirror-selection-high
   right: 4px;
   top: .5em;
 }
-#help-popup input[type="search"] {
+#help-popup input[type="search"],
+#help-popup .CodeMirror {
   margin: 3px;
 }
 
@@ -813,11 +817,6 @@ body.linter-disabled .hidden-unless-compact {
   margin-top: .75rem;
 }
 
-.usercss #name {
-  background-color: #eee;
-  color: #888;
-}
-
 .single-editor {
   height: 100%;
 }
diff --git a/edit/edit.js b/edit/edit.js
index c310c881..a9ffaa0e 100644
--- a/edit/edit.js
+++ b/edit/edit.js
@@ -1,15 +1,11 @@
 /* global CodeMirror onDOMready prefs setupLivePrefs $ $$ $create t tHTML
   createSourceEditor sessionStorageHash getOwnTab FIREFOX API tryCatch
-  closeCurrentTab messageBox debounce workerUtil
-  initBeautifyButton ignoreChromeError
+  closeCurrentTab messageBox debounce
+  initBeautifyButton ignoreChromeError dirtyReporter linter
   moveFocus msg createSectionsEditor rerouteHotkeys CODEMIRROR_THEMES */
 /* exported showCodeMirrorPopup editorWorker toggleContextMenuDelete */
 'use strict';
 
-const editorWorker = workerUtil.createWorker({
-  url: '/edit/editor-worker.js'
-});
-
 let saveSizeOnClose;
 
 // direct & reverse mapping of @-moz-document keywords and internal property names
@@ -28,48 +24,84 @@ document.addEventListener('visibilitychange', beforeUnload);
 window.addEventListener('beforeunload', beforeUnload);
 msg.onExtension(onRuntimeMessage);
 
-preinit();
+lazyInit();
 
-(() => {
-  onDOMready().then(() => {
-    prefs.subscribe(['editor.keyMap'], showHotkeyInTooltip);
-    addEventListener('showHotkeyInTooltip', showHotkeyInTooltip);
-    showHotkeyInTooltip();
+(async function init() {
+  const [style] = await Promise.all([
+    initStyleData(),
+    onDOMready(),
+    prefs.initializing.then(() => new Promise(resolve => {
+      const theme = prefs.get('editor.theme');
+      const el = $('#cm-theme');
+      if (theme === 'default') {
+        resolve();
+      } else {
+        // preload the theme so CodeMirror can use the correct metrics
+        el.href = `vendor/codemirror/theme/${theme}.css`;
+        el.addEventListener('load', resolve, {once: true});
+      }
+    })),
+  ]);
+  const usercss = isUsercss(style);
+  const dirty = dirtyReporter();
+  let wasDirty = false;
+  let nameTarget;
 
-    buildThemeElement();
-    buildKeymapElement();
+  prefs.subscribe(['editor.linter'], updateLinter);
+  prefs.subscribe(['editor.keyMap'], showHotkeyInTooltip);
+  addEventListener('showHotkeyInTooltip', showHotkeyInTooltip);
+  showHotkeyInTooltip();
+  buildThemeElement();
+  buildKeymapElement();
+  setupLivePrefs();
+  initNameArea();
+  initBeautifyButton($('#beautify'), () => editor.getEditors());
+  initResizeListener();
+  detectLayout();
+  updateTitle();
 
-    setupLivePrefs();
+  $('#heading').textContent = t(style.id ? 'editStyleHeading' : 'addStyleTitle');
+  $('#preview-label').classList.toggle('hidden', !style.id);
+
+  editor = (usercss ? createSourceEditor : createSectionsEditor)({
+    style,
+    dirty,
+    updateName,
+    toggleStyle,
   });
+  dirty.onChange(updateDirty);
+  await editor.ready;
 
-  initEditor();
+  // enabling after init to prevent flash of validation failure on an empty name
+  $('#name').required = !usercss;
+  $('#save-button').onclick = editor.save;
 
-  function getCodeMirrorThemes() {
-    if (!chrome.runtime.getPackageDirectoryEntry) {
-      const themes = [
-        chrome.i18n.getMessage('defaultTheme'),
-        ...CODEMIRROR_THEMES
-      ];
-      localStorage.codeMirrorThemes = themes.join(' ');
-      return Promise.resolve(themes);
-    }
-    return new Promise(resolve => {
-      chrome.runtime.getPackageDirectoryEntry(rootDir => {
-        rootDir.getDirectory('vendor/codemirror/theme', {create: false}, themeDir => {
-          themeDir.createReader().readEntries(entries => {
-            const themes = [
-              chrome.i18n.getMessage('defaultTheme')
-            ].concat(
-              entries.filter(entry => entry.isFile)
-                .sort((a, b) => (a.name < b.name ? -1 : 1))
-                .map(entry => entry.name.replace(/\.css$/, ''))
-            );
-            localStorage.codeMirrorThemes = themes.join(' ');
-            resolve(themes);
-          });
-        });
-      });
+  function initNameArea() {
+    const nameEl = $('#name');
+    const resetEl = $('#reset-name');
+    const isCustomName = style.updateUrl || usercss;
+    nameTarget = isCustomName ? 'customName' : 'name';
+    nameEl.placeholder = t(usercss ? 'usercssEditorNamePlaceholder' : 'styleMissingName');
+    nameEl.title = isCustomName ? t('customNameHint') : '';
+    nameEl.addEventListener('input', () => {
+      updateName();
+      resetEl.hidden = false;
     });
+    resetEl.hidden = !style.customName;
+    resetEl.onclick = () => {
+      const style = editor.style;
+      nameEl.focus();
+      nameEl.select();
+      // trying to make it undoable via Ctrl-Z
+      if (!document.execCommand('insertText', false, style.name)) {
+        nameEl.value = style.name;
+        updateName();
+      }
+      style.customName = null; // to delete it from db
+      resetEl.hidden = true;
+    };
+    const enabledEl = $('#enabled');
+    enabledEl.onchange = () => updateEnabledness(enabledEl.checked);
   }
 
   function findKeyForCommand(command, map) {
@@ -88,27 +120,10 @@ preinit();
   }
 
   function buildThemeElement() {
-    const themeElement = $('#editor.theme');
-    const themeList = localStorage.codeMirrorThemes;
-
-    const optionsFromArray = options => {
-      const fragment = document.createDocumentFragment();
-      options.forEach(opt => fragment.appendChild($create('option', opt)));
-      themeElement.appendChild(fragment);
-    };
-
-    if (themeList) {
-      optionsFromArray(themeList.split(/\s+/));
-    } else {
-      // Chrome is starting up and shows our edit.html, but the background page isn't loaded yet
-      const theme = prefs.get('editor.theme');
-      optionsFromArray([theme === 'default' ? t('defaultTheme') : theme]);
-      getCodeMirrorThemes().then(() => {
-        const themes = (localStorage.codeMirrorThemes || '').split(/\s+/);
-        optionsFromArray(themes);
-        themeElement.selectedIndex = Math.max(0, themes.indexOf(theme));
-      });
-    }
+    CODEMIRROR_THEMES.unshift(chrome.i18n.getMessage('defaultTheme'));
+    $('#editor.theme').append(...CODEMIRROR_THEMES.map(s => $create('option', s)));
+    // move the theme after built-in CSS so that its same-specificity selectors win
+    document.head.appendChild($('#cm-theme'));
   }
 
   function buildKeymapElement() {
@@ -159,134 +174,118 @@ preinit();
     }
   }
 
-  function initEditor() {
-    return Promise.all([
-      initStyleData(),
-      onDOMready(),
-      prefs.initializing,
-    ])
-      .then(([style]) => {
-        const usercss = isUsercss(style);
-        $('#heading').textContent = t(style.id ? 'editStyleHeading' : 'addStyleTitle');
-        $('#name').placeholder = t(usercss ? 'usercssEditorNamePlaceholder' : 'styleMissingName');
-        $('#name').title = usercss ? t('usercssReplaceTemplateName') : '';
-        $('#preview-label').classList.toggle('hidden', !style.id);
-        initBeautifyButton($('#beautify'), () => editor.getEditors());
-        const {onBoundsChanged} = chrome.windows || {};
-        if (onBoundsChanged) {
-          // * movement is reported even if the window wasn't resized
-          // * fired just once when done so debounce is not needed
-          onBoundsChanged.addListener(wnd => {
-            // getting the current window id as it may change if the user attached/detached the tab
-            chrome.windows.getCurrent(ownWnd => {
-              if (wnd.id === ownWnd.id) rememberWindowSize();
-            });
-          });
-        }
-        window.addEventListener('resize', () => {
-          if (!onBoundsChanged) debounce(rememberWindowSize, 100);
-          detectLayout();
+  function initResizeListener() {
+    const {onBoundsChanged} = chrome.windows || {};
+    if (onBoundsChanged) {
+      // * movement is reported even if the window wasn't resized
+      // * fired just once when done so debounce is not needed
+      onBoundsChanged.addListener(wnd => {
+        // getting the current window id as it may change if the user attached/detached the tab
+        chrome.windows.getCurrent(ownWnd => {
+          if (wnd.id === ownWnd.id) rememberWindowSize();
         });
-        detectLayout();
-        editor = (usercss ? createSourceEditor : createSectionsEditor)({
-          style,
-          onTitleChanged: updateTitle
-        });
-        editor.dirty.onChange(updateDirty);
-        return Promise.resolve(editor.ready && editor.ready())
-          .then(updateDirty);
       });
-  }
-
-  function updateTitle() {
-    if (editor) {
-      const styleName = editor.getStyle().name;
-      const isDirty = editor.dirty.isDirty();
-      document.title = (isDirty ? '* ' : '') + styleName;
     }
-  }
-
-  function updateDirty() {
-    const isDirty = editor.dirty.isDirty();
-    document.body.classList.toggle('dirty', isDirty);
-    $('#save-button').disabled = !isDirty;
-    updateTitle();
-  }
-})();
-
-function preinit() {
-  // preload the theme so that CodeMirror can calculate its metrics in DOMContentLoaded->setupLivePrefs()
-  new MutationObserver((mutations, observer) => {
-    const themeElement = $('#cm-theme');
-    if (themeElement) {
-      themeElement.href = prefs.get('editor.theme') === 'default' ? ''
-        : 'vendor/codemirror/theme/' + prefs.get('editor.theme') + '.css';
-      observer.disconnect();
-    }
-  }).observe(document, {subtree: true, childList: true});
-
-  if (chrome.windows) {
-    browser.tabs.query({currentWindow: true}).then(tabs => {
-      const windowId = tabs[0].windowId;
-      if (prefs.get('openEditInWindow')) {
-        if (
-          /true/.test(sessionStorage.saveSizeOnClose) &&
-          'left' in prefs.get('windowPosition', {}) &&
-          !isWindowMaximized()
-        ) {
-          // window was reopened via Ctrl-Shift-T etc.
-          chrome.windows.update(windowId, prefs.get('windowPosition'));
-        }
-        if (tabs.length === 1 && window.history.length === 1) {
-          chrome.windows.getAll(windows => {
-            if (windows.length > 1) {
-              sessionStorageHash('saveSizeOnClose').set(windowId, true);
-              saveSizeOnClose = true;
-            }
-          });
-        } else {
-          saveSizeOnClose = sessionStorageHash('saveSizeOnClose').value[windowId];
-        }
-      }
+    window.addEventListener('resize', () => {
+      if (!onBoundsChanged) debounce(rememberWindowSize, 100);
+      detectLayout();
     });
   }
 
-  getOwnTab().then(tab => {
-    const ownTabId = tab.id;
+  function toggleStyle() {
+    $('#enabled').checked = !style.enabled;
+    updateEnabledness(!style.enabled);
+  }
 
-    // use browser history back when 'back to manage' is clicked
-    if (sessionStorageHash('manageStylesHistory').value[ownTabId] === location.href) {
-      onDOMready().then(() => {
-        $('#cancel-button').onclick = event => {
-          event.stopPropagation();
-          event.preventDefault();
-          history.back();
-        };
-      });
+  function updateDirty() {
+    const isDirty = dirty.isDirty();
+    if (wasDirty !== isDirty) {
+      wasDirty = isDirty;
+      document.body.classList.toggle('dirty', isDirty);
+      $('#save-button').disabled = !isDirty;
     }
-    // no windows on android
-    if (!chrome.windows) {
+    updateTitle();
+  }
+
+  function updateEnabledness(enabled) {
+    dirty.modify('enabled', style.enabled, enabled);
+    style.enabled = enabled;
+    editor.updateLivePreview();
+  }
+
+  function updateName() {
+    if (!editor) return;
+    const {value} = $('#name');
+    dirty.modify('name', style[nameTarget] || style.name, value);
+    style[nameTarget] = value;
+    updateTitle({});
+  }
+
+  function updateTitle() {
+    document.title = `${dirty.isDirty() ? '* ' : ''}${style.customName || style.name}`;
+  }
+
+  function updateLinter(key, value) {
+    $('body').classList.toggle('linter-disabled', value === '');
+    linter.run();
+  }
+})();
+
+/* Stuff not needed for the main init so we can let it run at its own tempo */
+async function lazyInit() {
+  const ownTabId = (await getOwnTab()).id;
+  // use browser history back when 'back to manage' is clicked
+  if (sessionStorageHash('manageStylesHistory').value[ownTabId] === location.href) {
+    onDOMready().then(() => {
+      $('#cancel-button').onclick = event => {
+        event.stopPropagation();
+        event.preventDefault();
+        history.back();
+      };
+    });
+  }
+  // no windows on android
+  if (!chrome.windows) {
+    return;
+  }
+  const tabs = await browser.tabs.query({currentWindow: true});
+  const windowId = tabs[0].windowId;
+  if (prefs.get('openEditInWindow')) {
+    if (
+      /true/.test(sessionStorage.saveSizeOnClose) &&
+      'left' in prefs.get('windowPosition', {}) &&
+      !isWindowMaximized()
+    ) {
+      // window was reopened via Ctrl-Shift-T etc.
+      chrome.windows.update(windowId, prefs.get('windowPosition'));
+    }
+    if (tabs.length === 1 && window.history.length === 1) {
+      chrome.windows.getAll(windows => {
+        if (windows.length > 1) {
+          sessionStorageHash('saveSizeOnClose').set(windowId, true);
+          saveSizeOnClose = true;
+        }
+      });
+    } else {
+      saveSizeOnClose = sessionStorageHash('saveSizeOnClose').value[windowId];
+    }
+  }
+  chrome.tabs.onAttached.addListener((tabId, info) => {
+    if (tabId !== ownTabId) {
       return;
     }
-    // When an edit page gets attached or detached, remember its state
-    // so we can do the same to the next one to open.
-    chrome.tabs.onAttached.addListener((tabId, info) => {
-      if (tabId !== ownTabId) {
-        return;
+    if (info.newPosition !== 0) {
+      prefs.set('openEditInWindow', false);
+      return;
+    }
+    chrome.windows.get(info.newWindowId, {populate: true}, win => {
+      // If there's only one tab in this window, it's been dragged to new window
+      const openEditInWindow = win.tabs.length === 1;
+      if (openEditInWindow && FIREFOX) {
+        // FF-only because Chrome retardedly resets the size during dragging
+        chrome.windows.update(info.newWindowId, prefs.get('windowPosition'));
       }
-      if (info.newPosition !== 0) {
-        prefs.set('openEditInWindow', false);
-        return;
-      }
-      chrome.windows.get(info.newWindowId, {populate: true}, win => {
-        // If there's only one tab in this window, it's been dragged to new window
-        const openEditInWindow = win.tabs.length === 1;
-        if (openEditInWindow && FIREFOX) {
-          // FF-only because Chrome retardedly resets the size during dragging
-          chrome.windows.update(info.newWindowId, prefs.get('windowPosition'));
-        }
-        prefs.set('openEditInWindow', openEditInWindow);
-      });
+      prefs.set('openEditInWindow', openEditInWindow);
     });
   });
 }
@@ -295,7 +294,7 @@ function onRuntimeMessage(request) {
   switch (request.method) {
     case 'styleUpdated':
       if (
-        editor.getStyleId() === request.style.id &&
+        editor.style.id === request.style.id &&
         !['editPreview', 'editPreviewEnd', 'editSave', 'config']
           .includes(request.reason)
       ) {
@@ -309,7 +308,7 @@ function onRuntimeMessage(request) {
       }
       break;
     case 'styleDeleted':
-      if (editor.getStyleId() === request.style.id) {
+      if (editor.style.id === request.style.id) {
         document.removeEventListener('visibilitychange', beforeUnload);
         document.removeEventListener('beforeunload', beforeUnload);
         closeCurrentTab();
@@ -503,10 +502,6 @@ function rememberWindowSize() {
   }
 }
 
-prefs.subscribe(['editor.linter'], (key, value) => {
-  $('body').classList.toggle('linter-disabled', value === '');
-});
-
 function fixedHeader() {
   const scrollPoint = $('#header').clientHeight - 40;
   const linterEnabled = prefs.get('editor.linter') !== '';
diff --git a/edit/linter.js b/edit/linter.js
index a8d927fa..607eb057 100644
--- a/edit/linter.js
+++ b/edit/linter.js
@@ -1,6 +1,11 @@
-/* global prefs */
+/* global workerUtil */
 'use strict';
 
+/* exported editorWorker */
+const editorWorker = workerUtil.createWorker({
+  url: '/edit/editor-worker.js'
+});
+
 /* exported linter */
 const linter = (() => {
   const lintingUpdatedListeners = [];
@@ -59,8 +64,3 @@ const linter = (() => {
       .then(results => [].concat(...results.filter(Boolean)));
   }
 })();
-
-// FIXME: this should be put inside edit.js
-prefs.subscribe(['editor.linter'], () => {
-  linter.run();
-});
diff --git a/edit/sections-editor.js b/edit/sections-editor.js
index 8a04e06c..d7fde20b 100644
--- a/edit/sections-editor.js
+++ b/edit/sections-editor.js
@@ -1,41 +1,24 @@
-/* global dirtyReporter showHelp toggleContextMenuDelete createSection
+/* global showHelp toggleContextMenuDelete createSection
   CodeMirror linter createLivePreview showCodeMirrorPopup
   sectionsToMozFormat messageBox clipString
-  rerouteHotkeys $ $$ $create t FIREFOX API
+  $ $$ $create t FIREFOX API
   debounce */
 /* exported createSectionsEditor */
 'use strict';
 
-function createSectionsEditor({style, onTitleChanged}) {
+function createSectionsEditor(editorBase) {
+  const {style, dirty} = editorBase;
+
   let INC_ID = 0; // an increment id that is used by various object to track the order
-  const dirty = dirtyReporter();
 
   const container = $('#sections');
   const sections = [];
 
   container.classList.add('section-editor');
-
-  const nameEl = $('#name');
-  nameEl.addEventListener('input', () => {
-    dirty.modify('name', style.name, nameEl.value);
-    style.name = nameEl.value;
-    onTitleChanged();
-  });
-
-  const enabledEl = $('#enabled');
-  enabledEl.addEventListener('change', () => {
-    dirty.modify('enabled', style.enabled, enabledEl.checked);
-    style.enabled = enabledEl.checked;
-    updateLivePreview();
-  });
-
   updateHeader();
-  rerouteHotkeys(true);
-
   $('#to-mozilla').addEventListener('click', showMozillaFormat);
   $('#to-mozilla-help').addEventListener('click', showToMozillaHelp);
   $('#from-mozilla').addEventListener('click', () => showMozillaFormatImport());
-  $('#save-button').addEventListener('click', saveStyle);
 
   document.addEventListener('wheel', scrollEntirePageOnCtrlShift, {passive: false});
   CodeMirror.defaults.extraKeys['Shift-Ctrl-Wheel'] = 'scrollWindow';
@@ -65,33 +48,30 @@ function createSectionsEditor({style, onTitleChanged}) {
 
   let sectionOrder = '';
   let headerOffset; // in compact mode the header is at the top so it reduces the available height
-  const initializing = initSections(style.sections.slice());
+  const ready = initSections(style.sections.slice());
 
   const livePreview = createLivePreview();
   livePreview.show(Boolean(style.id));
 
-  return {
-    ready: () => initializing,
+  return Object.assign({}, editorBase, {
+    ready,
     replaceStyle,
-    dirty,
-    getStyle: () => style,
     getEditors,
     scrollToEditor,
-    getStyleId: () => style.id,
     getEditorTitle: cm => {
       const index = sections.filter(s => !s.isRemoved()).findIndex(s => s.cm === cm);
       return `${t('sectionCode')} ${index + 1}`;
     },
-    save: saveStyle,
-    toggleStyle,
+    save,
     nextEditor,
     prevEditor,
     closestVisible,
     getSearchableInputs,
-  };
+    updateLivePreview,
+  });
 
   function fitToContent(section) {
-    const {cm, cm: {display: {wrapper, sizer}}} = section;
+    const {el, cm, cm: {display: {wrapper, sizer}}} = section;
     if (cm.display.renderedView) {
       resize();
     } else {
@@ -104,7 +84,7 @@ function createSectionsEditor({style, onTitleChanged}) {
         return;
       }
       if (headerOffset == null) {
-        headerOffset = wrapper.getBoundingClientRect().top;
+        headerOffset = el.getBoundingClientRect().top;
       }
       contentHeight += 9; // border & resize grip
       cm.off('update', resize);
@@ -115,16 +95,15 @@ function createSectionsEditor({style, onTitleChanged}) {
   }
 
   function fitToAvailableSpace() {
-    const available =
-      Math.floor(container.offsetHeight - sections.reduce((h, s) => h + s.el.offsetHeight, 0)) ||
-      window.innerHeight - container.offsetHeight;
-    if (available <= 0) {
-      return;
+    const ch = container.offsetHeight;
+    let available = ch - sections[sections.length - 1].el.getBoundingClientRect().bottom + headerOffset;
+    if (available <= 1) available = window.innerHeight - ch - headerOffset;
+    const delta = Math.floor(available / sections.length);
+    if (delta > 1) {
+      sections.forEach(({cm}) => {
+        cm.setSize(null, cm.display.wrapper.offsetHeight + delta);
+      });
     }
-    const cmHeights = sections.map(s => s.cm.getWrapperElement().offsetHeight);
-    sections.forEach((section, i) => {
-      section.cm.setSize(null, cmHeights[i] + Math.floor(available / sections.length));
-    });
   }
 
   function genId() {
@@ -246,14 +225,6 @@ function createSectionsEditor({style, onTitleChanged}) {
     return sections.filter(s => !s.isRemoved()).map(s => s.cm);
   }
 
-  function toggleStyle() {
-    const newValue = !style.enabled;
-    dirty.modify('enabled', style.enabled, newValue);
-    style.enabled = newValue;
-    enabledEl.checked = newValue;
-    updateLivePreview();
-  }
-
   function nextEditor(cm, cycle = true) {
     if (!cycle && findLast(sections, s => !s.isRemoved()).cm === cm) {
       return;
@@ -417,7 +388,7 @@ function createSectionsEditor({style, onTitleChanged}) {
   }
 
   function validate() {
-    if (!nameEl.reportValidity()) {
+    if (!$('#name').reportValidity()) {
       messageBox.alert(t('styleMissingName'));
       return false;
     }
@@ -435,7 +406,7 @@ function createSectionsEditor({style, onTitleChanged}) {
     return true;
   }
 
-  function saveStyle() {
+  function save() {
     if (!dirty.isDirty()) {
       return;
     }
@@ -464,10 +435,10 @@ function createSectionsEditor({style, onTitleChanged}) {
   }
 
   function updateHeader() {
-    nameEl.value = style.name || '';
-    enabledEl.checked = style.enabled !== false;
+    $('#name').value = style.customName || style.name || '';
+    $('#enabled').checked = style.enabled !== false;
     $('#url').href = style.url || '';
-    onTitleChanged();
+    editorBase.updateName();
   }
 
   function updateLivePreview() {
@@ -609,6 +580,7 @@ function createSectionsEditor({style, onTitleChanged}) {
   }
 
   function replaceStyle(newStyle, codeIsUpdated) {
+    dirty.clear('name');
     // FIXME: avoid recreating all editors?
     reinit().then(() => {
       Object.assign(style, newStyle);
diff --git a/edit/source-editor.js b/edit/source-editor.js
index b3292606..af72b911 100644
--- a/edit/source-editor.js
+++ b/edit/source-editor.js
@@ -1,4 +1,4 @@
-/* global dirtyReporter
+/* global
   createAppliesToLineWidget messageBox
   sectionsToMozFormat
   createMetaCompiler linter createLivePreview cmFactory $ $create API prefs t
@@ -6,17 +6,14 @@
 /* exported createSourceEditor */
 'use strict';
 
-function createSourceEditor({style, onTitleChanged}) {
-  $('#name').disabled = true;
-  $('#save-button').disabled = true;
+function createSourceEditor(editorBase) {
+  const {style, dirty} = editorBase;
+
   $('#mozilla-format-container').remove();
-  $('#save-button').onclick = save;
   $('#header').addEventListener('wheel', headerOnScroll);
   $('#sections').textContent = '';
   $('#sections').appendChild($create('.single-editor'));
 
-  const dirty = dirtyReporter();
-
   // normalize style
   if (!style.id) setupNewStyle(style);
 
@@ -28,13 +25,6 @@ function createSourceEditor({style, onTitleChanged}) {
   const livePreview = createLivePreview(preprocess);
   livePreview.show(Boolean(style.id));
 
-  $('#enabled').onchange = function () {
-    const value = this.checked;
-    dirty.modify('enabled', style.enabled, value);
-    style.enabled = value;
-    updateLivePreview();
-  };
-
   cm.on('changes', () => {
     dirty.modify('sourceGeneration', savedGeneration, cm.changeGeneration());
     updateLivePreview();
@@ -162,14 +152,15 @@ function createSourceEditor({style, onTitleChanged}) {
   }
 
   function updateMeta() {
-    $('#name').value = style.name;
+    $('#name').value = style.customName || style.name;
     $('#enabled').checked = style.enabled;
     $('#url').href = style.url;
-    onTitleChanged();
+    editorBase.updateName();
     return cm.setPreprocessor((style.usercssData || {}).preprocessor);
   }
 
   function replaceStyle(newStyle, codeIsUpdated) {
+    dirty.clear('name');
     const sameCode = newStyle.sourceCode === cm.getValue();
     if (sameCode) {
       savedGeneration = cm.changeGeneration();
@@ -210,14 +201,6 @@ function createSourceEditor({style, onTitleChanged}) {
     }
   }
 
-  function toggleStyle() {
-    const value = !style.enabled;
-    dirty.modify('enabled', style.enabled, value);
-    style.enabled = value;
-    updateMeta();
-    $('#enabled').dispatchEvent(new Event('change', {bubbles: true}));
-  }
-
   function save() {
     if (!dirty.isDirty()) return;
     const code = cm.getValue();
@@ -226,6 +209,7 @@ function createSourceEditor({style, onTitleChanged}) {
         id: style.id,
         enabled: style.enabled,
         sourceCode: code,
+        customName: style.customName,
       }))
       .then(replaceStyle)
       .catch(err => {
@@ -372,19 +356,17 @@ function createSourceEditor({style, onTitleChanged}) {
            (mode.helperType || '');
   }
 
-  return {
+  return Object.assign({}, editorBase, {
+    ready: Promise.resolve(),
     replaceStyle,
-    dirty,
-    getStyle: () => style,
     getEditors: () => [cm],
     scrollToEditor: () => {},
-    getStyleId: () => style.id,
     getEditorTitle: () => '',
     save,
-    toggleStyle,
     prevEditor: cm => nextPrevMozDocument(cm, -1),
     nextEditor: cm => nextPrevMozDocument(cm, 1),
     closestVisible: () => cm,
-    getSearchableInputs: () => []
-  };
+    getSearchableInputs: () => [],
+    updateLivePreview,
+  });
 }
diff --git a/install-usercss/install-usercss.js b/install-usercss/install-usercss.js
index 41ee0ab1..8ce11002 100644
--- a/install-usercss/install-usercss.js
+++ b/install-usercss/install-usercss.js
@@ -243,7 +243,7 @@
       (!dup ?
         Promise.resolve(true) :
         messageBox.confirm(t('styleInstallOverwrite', [
-          data.name,
+          data.name + (dup.customName ? ` (${dup.customName})` : ''),
           dupData.version,
           data.version,
         ]))
diff --git a/js/msg.js b/js/msg.js
index 26dba45d..53f17bfa 100644
--- a/js/msg.js
+++ b/js/msg.js
@@ -33,7 +33,8 @@ self.msg = self.INJECTED === 1 ? self.msg : (() => {
     onExtension,
     off,
     RX_NO_RECEIVER,
-    RX_PORT_CLOSED
+    RX_PORT_CLOSED,
+    isBg,
   };
 
   function getBg() {
diff --git a/js/prefs.js b/js/prefs.js
index bb3ba650..c7fb981c 100644
--- a/js/prefs.js
+++ b/js/prefs.js
@@ -1,6 +1,8 @@
-/* global promisifyChrome */
+/* global promisifyChrome msg API */
 'use strict';
 
+// Needs msg.js loaded first
+
 self.prefs = self.INJECTED === 1 ? self.prefs : (() => {
   const defaults = {
     'openEditInWindow': false,      // new editor opens in a own browser window
@@ -112,12 +114,11 @@ self.prefs = self.INJECTED === 1 ? self.prefs : (() => {
     'storage.sync': ['get', 'set'],
   });
 
-  const initializing = browser.storage.sync.get('settings')
-    .then(result => {
-      if (result.settings) {
-        setAll(result.settings, true);
-      }
-    });
+  const initializing = (
+    msg.isBg
+      ? browser.storage.sync.get('settings').then(res => res.settings)
+      : API.getPrefs()
+  ).then(res => res && setAll(res, true));
 
   chrome.storage.onChanged.addListener((changes, area) => {
     if (area !== 'sync' || !changes.settings || !changes.settings.newValue) {
diff --git a/js/script-loader.js b/js/script-loader.js
index ada07824..2517951f 100644
--- a/js/script-loader.js
+++ b/js/script-loader.js
@@ -48,73 +48,3 @@ const loadScript = (() => {
     ));
   };
 })();
-
-
-(() => {
-  let subscribers, observer;
-  // natively declared <script> elements in html can't have onload= attribute
-  // due to the default extension CSP that forbids inline code (and we don't want to relax it),
-  // so we're using MutationObserver to add onload event listener to the script element to be loaded
-  window.onDOMscriptReady = (srcSuffix, timeout = 1000) => {
-    if (!subscribers) {
-      subscribers = new Map();
-      observer = new MutationObserver(observe);
-      observer.observe(document.head, {childList: true});
-    }
-    return new Promise((resolve, reject) => {
-      const listeners = subscribers.get(srcSuffix);
-      if (listeners) {
-        listeners.push(resolve);
-      } else {
-        subscribers.set(srcSuffix, [resolve]);
-      }
-      // a resolved Promise won't reject anymore
-      setTimeout(() => {
-        emptyAfterCleanup(srcSuffix);
-        reject(new Error('Timeout'));
-      }, timeout);
-    });
-  };
-
-  return;
-
-  function observe(mutations) {
-    for (const {addedNodes} of mutations) {
-      for (const n of addedNodes) {
-        if (n.src && getSubscribersForSrc(n.src)) {
-          n.addEventListener('load', notifySubscribers, {once: true});
-        }
-      }
-    }
-  }
-
-  function getSubscribersForSrc(src) {
-    for (const [suffix, listeners] of subscribers.entries()) {
-      if (src.endsWith(suffix)) {
-        return {suffix, listeners};
-      }
-    }
-  }
-
-  function notifySubscribers(event) {
-    for (let data; (data = getSubscribersForSrc(this.src));) {
-      data.listeners.forEach(fn => fn(event));
-      if (emptyAfterCleanup(data.suffix)) {
-        return;
-      }
-    }
-  }
-
-  function emptyAfterCleanup(suffix) {
-    if (!subscribers) {
-      return true;
-    }
-    subscribers.delete(suffix);
-    if (!subscribers.size) {
-      observer.disconnect();
-      observer = null;
-      subscribers = null;
-      return true;
-    }
-  }
-})();
diff --git a/manage.html b/manage.html
index 6744d802..28b885f5 100644
--- a/manage.html
+++ b/manage.html
@@ -149,8 +149,8 @@
   <script src="js/polyfill.js"></script>
   <script src="js/dom.js"></script>
   <script src="js/messaging.js"></script>
-  <script src="js/prefs.js"></script>
   <script src="js/msg.js"></script>
+  <script src="js/prefs.js"></script>
   <script src="js/router.js"></script>
   <script src="content/style-injector.js"></script>
   <script src="content/apply.js"></script>
diff --git a/manage/config-dialog.js b/manage/config-dialog.js
index e4126422..ed36cef6 100644
--- a/manage/config-dialog.js
+++ b/manage/config-dialog.js
@@ -23,7 +23,7 @@ function configDialog(style) {
   vars.forEach(renderValueState);
 
   return messageBox({
-    title: `${style.name} v${data.version}`,
+    title: `${style.customName || style.name} v${data.version}`,
     className: 'config-dialog' + (isPopup ? ' stylus-popup' : ''),
     contents: [
       $create('.config-heading', data.supportURL &&
diff --git a/manage/filters.js b/manage/filters.js
index 11e11feb..3d670dfe 100644
--- a/manage/filters.js
+++ b/manage/filters.js
@@ -14,7 +14,7 @@ let initialized = false;
 router.watch({search: ['search']}, ([search]) => {
   $('#search').value = search || '';
   if (!initialized) {
-    init();
+    initFilters();
     initialized = true;
   } else {
     searchStyles();
@@ -36,7 +36,7 @@ HTMLSelectElement.prototype.adjustWidth = function () {
   parent.replaceChild(this, singleSelect);
 };
 
-function init() {
+function initFilters() {
   $('#search').oninput = e => {
     router.updateSearch('search', e.target.value);
   };
diff --git a/manage/import-export.js b/manage/import-export.js
index 7d08fc89..15261baf 100644
--- a/manage/import-export.js
+++ b/manage/import-export.js
@@ -1,15 +1,11 @@
 /* global messageBox styleSectionsEqual API onDOMready
   tryJSONparse scrollElementIntoView $ $$ API $create t animateElement
-  styleJSONseemsValid */
-/* exported bulkChangeQueue bulkChangeTime */
+  styleJSONseemsValid bulkChangeQueue */
 'use strict';
 
 const STYLISH_DUMP_FILE_EXT = '.txt';
 const STYLUS_BACKUP_FILE_EXT = '.json';
 
-let bulkChangeQueue = [];
-let bulkChangeTime = 0;
-
 onDOMready().then(() => {
   $('#file-all-styles').onclick = () => exportToFile();
   $('#unfile-all-styles').onclick = () => importFromFile({fileTypeFilter: STYLUS_BACKUP_FILE_EXT});
@@ -135,7 +131,7 @@ function importFromString(jsonString) {
       }
     });
     bulkChangeQueue.length = 0;
-    bulkChangeTime = performance.now();
+    bulkChangeQueue.time = performance.now();
     return API.importManyStyles(items.map(i => i.item))
       .then(styles => {
         for (let i = 0; i < styles.length; i++) {
diff --git a/manage/manage.js b/manage/manage.js
index 5bd0ca55..888da2e8 100644
--- a/manage/manage.js
+++ b/manage/manage.js
@@ -4,11 +4,10 @@ global messageBox getStyleWithNoCode
   checkUpdate handleUpdateInstalled
   objectDiff
   configDialog
-  sorter msg prefs API onDOMready $ $$ $create template setupLivePrefs
+  sorter msg prefs API $ $$ $create template setupLivePrefs
   t tWordBreak formatDate
   getOwnTab getActiveTab openURL animateElement sessionStorageHash debounce
   scrollElementIntoView CHROME VIVALDI router
-  bulkChangeTime:true bulkChangeQueue
 */
 'use strict';
 
@@ -18,6 +17,8 @@ const ENTRY_ID_PREFIX_RAW = 'style-';
 const ENTRY_ID_PREFIX = '#' + ENTRY_ID_PREFIX_RAW;
 
 const BULK_THROTTLE_MS = 100;
+const bulkChangeQueue = [];
+bulkChangeQueue.time = 0;
 
 // define pref-mapped ids separately
 const newUI = {
@@ -49,18 +50,45 @@ Promise.all([
   API.getAllStyles(true),
   // FIXME: integrate this into filter.js
   router.getSearch('search') && API.searchDB({query: router.getSearch('search')}),
-  Promise.all([
-    onDOMready(),
-    prefs.initializing,
-  ])
-    .then(() => {
-      initGlobalEvents();
-      if (!VIVALDI) {
-        $$('#header select').forEach(el => el.adjustWidth());
-      }
-    }),
-]).then(args => {
-  showStyles(...args);
+  waitForSelector('#installed'), // needed to avoid flicker due to an extra frame and layout shift
+  prefs.initializing
+]).then(([styles, ids, el]) => {
+  installed = el;
+  installed.onclick = handleEvent.entryClicked;
+  $('#manage-options-button').onclick = () => router.updateHash('#stylus-options');
+  $('#sync-styles').onclick = () => router.updateHash('#stylus-options');
+  $$('#header a[href^="http"]').forEach(a => (a.onclick = handleEvent.external));
+  // show date installed & last update on hover
+  installed.addEventListener('mouseover', handleEvent.lazyAddEntryTitle);
+  installed.addEventListener('mouseout', handleEvent.lazyAddEntryTitle);
+  document.addEventListener('visibilitychange', onVisibilityChange);
+  // N.B. triggers existing onchange listeners
+  setupLivePrefs();
+  sorter.init();
+  prefs.subscribe(newUI.ids.map(newUI.prefKeyForId), () => switchUI());
+  switchUI({styleOnly: true});
+  // translate CSS manually
+  document.head.appendChild($create('style', `
+    .disabled h2::after {
+      content: "${t('genericDisabledLabel')}";
+    }
+    #update-all-no-updates[data-skipped-edited="true"]::after {
+      content: " ${t('updateAllCheckSucceededSomeEdited')}";
+    }
+    body.all-styles-hidden-by-filters::after {
+      content: "${t('filteredStylesAllHidden')}";
+    }
+  `));
+  if (!VIVALDI) {
+    $$('#header select').forEach(el => el.adjustWidth());
+  }
+  if (CHROME >= 80 && CHROME <= 88) {
+    // Wrong checkboxes are randomly checked after going back in history, https://crbug.com/1138598
+    addEventListener('pagehide', () => {
+      $$('input[type=checkbox]').forEach((el, i) => (el.name = `bug${i}`));
+    });
+  }
+  showStyles(styles, ids);
 });
 
 msg.onExtension(onRuntimeMessage);
@@ -71,7 +99,7 @@ function onRuntimeMessage(msg) {
     case 'styleAdded':
     case 'styleDeleted':
       bulkChangeQueue.push(msg);
-      if (performance.now() - bulkChangeTime < BULK_THROTTLE_MS) {
+      if (performance.now() - bulkChangeQueue.time < BULK_THROTTLE_MS) {
         debounce(handleBulkChange, BULK_THROTTLE_MS);
       } else {
         handleBulkChange();
@@ -86,61 +114,16 @@ function onRuntimeMessage(msg) {
   setTimeout(sorter.updateStripes, 0, {onlyWhenColumnsChanged: true});
 }
 
-
-function initGlobalEvents() {
-  installed = $('#installed');
-  installed.onclick = handleEvent.entryClicked;
-  $('#manage-options-button').onclick = () => router.updateHash('#stylus-options');
-  $('#sync-styles').onclick = () => router.updateHash('#stylus-options');
-  $$('#header a[href^="http"]').forEach(a => (a.onclick = handleEvent.external));
-  // show date installed & last update on hover
-  installed.addEventListener('mouseover', handleEvent.lazyAddEntryTitle);
-  installed.addEventListener('mouseout', handleEvent.lazyAddEntryTitle);
-
-  document.addEventListener('visibilitychange', onVisibilityChange);
-
-  $$('[data-toggle-on-click]').forEach(el => {
-    // dataset on SVG doesn't work in Chrome 49-??, works in 57+
-    const target = $(el.getAttribute('data-toggle-on-click'));
-    el.onclick = event => {
-      event.preventDefault();
-      target.classList.toggle('hidden');
-      if (target.classList.contains('hidden')) {
-        el.removeAttribute('open');
-      } else {
-        el.setAttribute('open', '');
-      }
-    };
-  });
-
-  // N.B. triggers existing onchange listeners
-  setupLivePrefs();
-  sorter.init();
-
-  prefs.subscribe(newUI.ids.map(newUI.prefKeyForId), () => switchUI());
-
-  switchUI({styleOnly: true});
-
-  // translate CSS manually
-  document.head.appendChild($create('style', `
-    .disabled h2::after {
-      content: "${t('genericDisabledLabel')}";
-    }
-    #update-all-no-updates[data-skipped-edited="true"]::after {
-      content: " ${t('updateAllCheckSucceededSomeEdited')}";
-    }
-    body.all-styles-hidden-by-filters::after {
-      content: "${t('filteredStylesAllHidden')}";
-    }
-  `));
-}
-
 function showStyles(styles = [], matchUrlIds) {
   const sorted = sorter.sort({
-    styles: styles.map(style => ({
-      style,
-      name: (style.name || '').toLocaleLowerCase() + '\n' + style.name,
-    })),
+    styles: styles.map(style => {
+      const name = style.customName || style.name || '';
+      return {
+        style,
+        // sort case-insensitively the whole list then sort dupes like `Foo` and `foo` case-sensitively
+        name: name.toLocaleLowerCase() + '\n' + name,
+      };
+    }),
   });
   let index = 0;
   let firstRun = true;
@@ -187,7 +170,7 @@ function showStyles(styles = [], matchUrlIds) {
 }
 
 
-function createStyleElement({style, name}) {
+function createStyleElement({style, name: nameLC}) {
   // query the sub-elements just once, then reuse the references
   if ((createStyleElement.parts || {}).newUI !== newUI.enabled) {
     const entry = template[`style${newUI.enabled ? 'Compact' : ''}`];
@@ -216,8 +199,9 @@ function createStyleElement({style, name}) {
   }
   const parts = createStyleElement.parts;
   const configurable = style.usercssData && style.usercssData.vars && Object.keys(style.usercssData.vars).length > 0;
+  const name = style.customName || style.name;
   parts.checker.checked = style.enabled;
-  parts.nameLink.textContent = tWordBreak(style.name);
+  parts.nameLink.textContent = tWordBreak(name);
   parts.nameLink.href = parts.editLink.href = parts.editHrefBase + style.id;
   parts.homepage.href = parts.homepage.title = style.url || '';
   if (!newUI.enabled) {
@@ -234,7 +218,7 @@ function createStyleElement({style, name}) {
   const entry = parts.entry.cloneNode(true);
   entry.id = ENTRY_ID_PREFIX_RAW + style.id;
   entry.styleId = style.id;
-  entry.styleNameLowerCase = name || style.name.toLocaleLowerCase();
+  entry.styleNameLowerCase = nameLC || name.toLocaleLowerCase() + '\n' + name;
   entry.styleMeta = style;
   entry.className = parts.entryClassBase + ' ' +
     (style.enabled ? 'enabled' : 'disabled') +
@@ -437,7 +421,7 @@ Object.assign(handleEvent, {
     animateElement(entry);
     messageBox({
       title: t('deleteStyleConfirm'),
-      contents: entry.styleMeta.name,
+      contents: entry.styleMeta.customName || entry.styleMeta.name,
       className: 'danger center',
       buttons: [t('confirmDelete'), t('confirmCancel')],
     })
@@ -533,7 +517,7 @@ function handleBulkChange() {
     const {id} = msg.style;
     if (msg.method === 'styleDeleted') {
       handleDelete(id);
-      bulkChangeTime = performance.now();
+      bulkChangeQueue.time = performance.now();
     } else {
       handleUpdateForId(id, msg);
     }
@@ -544,7 +528,7 @@ function handleBulkChange() {
 function handleUpdateForId(id, opts) {
   return API.getStyle(id, true).then(style => {
     handleUpdate(style, opts);
-    bulkChangeTime = performance.now();
+    bulkChangeQueue.time = performance.now();
   });
 }
 
@@ -718,6 +702,20 @@ function highlightEditedStyle() {
   }
 }
 
+function waitForSelector(selector) {
+  // TODO: if used in other places, move to dom.js
+  // TODO: if used concurrently, rework to use just one observer internally
+  return new Promise(resolve => {
+    const mo = new MutationObserver(() => {
+      const el = $(selector);
+      if (el) {
+        mo.disconnect();
+        resolve(el);
+      }
+    });
+    mo.observe(document, {childList: true, subtree: true});
+  });
+}
 
 function embedOptions() {
   let options = $('#stylus-embedded-options');
diff --git a/manage/sort.js b/manage/sort.js
index 928e3733..17454424 100644
--- a/manage/sort.js
+++ b/manage/sort.js
@@ -130,7 +130,7 @@ const sorter = (() => {
     const sorted = sort({
       styles: current.map(entry => ({
         entry,
-        name: entry.styleNameLowerCase + '\n' + entry.styleMeta.name,
+        name: entry.styleNameLowerCase,
         style: entry.styleMeta,
       }))
     });
diff --git a/popup.html b/popup.html
index 677edb81..1a39b3a4 100644
--- a/popup.html
+++ b/popup.html
@@ -180,8 +180,8 @@
   <script src="js/dom.js"></script>
   <script src="js/messaging.js"></script>
   <script src="js/localization.js"></script>
-  <script src="js/prefs.js"></script>
   <script src="js/msg.js"></script>
+  <script src="js/prefs.js"></script>
   <script src="content/style-injector.js"></script>
   <script src="content/apply.js"></script>
 
diff --git a/popup/popup.js b/popup/popup.js
index 1510ce76..979fdd4c 100644
--- a/popup/popup.js
+++ b/popup/popup.js
@@ -310,7 +310,7 @@ function sortStyles(entries) {
   return entries.sort(({styleMeta: a}, {styleMeta: b}) =>
     Boolean(a.frameUrl) - Boolean(b.frameUrl) ||
     enabledFirst && Boolean(b.enabled) - Boolean(a.enabled) ||
-    a.name.localeCompare(b.name));
+    (a.customName || a.name).localeCompare(b.customName || b.name));
 }
 
 function showStyles(frameResults) {
@@ -408,7 +408,7 @@ function createStyleElement(style) {
   $('.checker', entry).checked = style.enabled;
 
   const styleName = $('.style-name', entry);
-  styleName.lastChild.textContent = style.name;
+  styleName.lastChild.textContent = style.customName || style.name;
   setTimeout(() => {
     styleName.title = entry.styleMeta.sloppy ?
       t('styleNotAppliedRegexpProblemTooltip') :