diff --git a/src/templates/index.html b/src/templates/index.html
index 822f518..b8b28ce 100644
--- a/src/templates/index.html
+++ b/src/templates/index.html
@@ -86,7 +86,20 @@
 
                                 <div class="field-group">
                                     <label for="room-password">Room password (optional)</label>
-                                    <input type="password" id="room-password" name="password" maxlength="64" placeholder="Optional password">
+                                    <input
+                                        type="password"
+                                        id="room-password"
+                                        name="password"
+                                        maxlength="64"
+                                        placeholder="Optional password"
+                                        autocomplete="new-password"
+                                        data-bwignore="true"
+                                        data-1p-ignore="true"
+                                        data-lpignore="true"
+                                        autocapitalize="off"
+                                        autocorrect="off"
+                                        spellcheck="false"
+                                    >
                                 </div>
                             </div>
 
diff --git a/static/js/ui-controls.js b/static/js/ui-controls.js
index c1f2fdb..e933069 100644
--- a/static/js/ui-controls.js
+++ b/static/js/ui-controls.js
@@ -40,6 +40,10 @@
         return Math.min(max, Math.max(min, value));
     }
 
+    function hasOwn(obj, key) {
+        return Object.prototype.hasOwnProperty.call(obj, key);
+    }
+
     function parseJSON(value, fallback) {
         if (!value) {
             return fallback;
@@ -153,7 +157,58 @@
         saveWindowLayouts();
     }
 
-    function ensureWindowLayout(def) {
+    function measureLayoutFromContent(def) {
+        const windowEl = def.el;
+        const fallback = def.defaultLayout;
+        const wasHidden = windowEl.classList.contains('hidden');
+        const previousStyles = {
+            visibility: windowEl.style.visibility,
+            left: windowEl.style.left,
+            top: windowEl.style.top,
+            width: windowEl.style.width,
+            height: windowEl.style.height,
+            right: windowEl.style.right,
+            bottom: windowEl.style.bottom,
+            transform: windowEl.style.transform,
+        };
+
+        if (wasHidden) {
+            windowEl.classList.remove('hidden');
+        }
+
+        windowEl.style.visibility = 'hidden';
+        windowEl.style.left = '-10000px';
+        windowEl.style.top = '-10000px';
+        windowEl.style.width = 'max-content';
+        windowEl.style.height = 'auto';
+        windowEl.style.right = 'auto';
+        windowEl.style.bottom = 'auto';
+        windowEl.style.transform = 'none';
+
+        const rect = windowEl.getBoundingClientRect();
+
+        windowEl.style.visibility = previousStyles.visibility;
+        windowEl.style.left = previousStyles.left;
+        windowEl.style.top = previousStyles.top;
+        windowEl.style.width = previousStyles.width;
+        windowEl.style.height = previousStyles.height;
+        windowEl.style.right = previousStyles.right;
+        windowEl.style.bottom = previousStyles.bottom;
+        windowEl.style.transform = previousStyles.transform;
+
+        if (wasHidden) {
+            windowEl.classList.add('hidden');
+        }
+
+        return normalizeLayout({
+            left: fallback.left,
+            top: fallback.top,
+            width: Number.isFinite(rect.width) && rect.width > 0 ? Math.ceil(rect.width) : fallback.width,
+            height: Number.isFinite(rect.height) && rect.height > 0 ? Math.ceil(rect.height) : fallback.height,
+        }, fallback);
+    }
+
+    function ensureWindowLayout(def, options = {}) {
         if (isMobileViewport()) {
             def.el.style.right = 'auto';
             def.el.style.bottom = 'auto';
@@ -161,7 +216,12 @@
             return;
         }
 
-        const normalized = normalizeLayout(windowLayouts[def.id], def.defaultLayout);
+        const hasSavedLayout = hasOwn(options, 'hasSavedLayout')
+            ? options.hasSavedLayout
+            : hasOwn(windowLayouts, def.id);
+        const normalized = hasSavedLayout
+            ? normalizeLayout(windowLayouts[def.id], def.defaultLayout)
+            : measureLayoutFromContent(def);
         const clamped = clampLayoutToViewport(normalized);
         applyLayout(def.el, clamped);
         windowLayouts[def.id] = clamped;
@@ -284,11 +344,20 @@
 
     function initWindowLayouts() {
         windowLayouts = loadWindowLayouts();
+        let shouldPersistSeededLayouts = false;
 
         windowDefs.forEach((def) => {
-            ensureWindowLayout(def);
+            const hasSavedLayout = hasOwn(windowLayouts, def.id);
+            ensureWindowLayout(def, { hasSavedLayout });
+            if (!hasSavedLayout) {
+                shouldPersistSeededLayouts = true;
+            }
         });
 
+        if (shouldPersistSeededLayouts) {
+            saveWindowLayouts();
+        }
+
         window.addEventListener('resize', () => {
             if (isMobileViewport()) {
                 return;