diff --git a/static/index.html b/static/index.html
index c175558e9..a7d0389e5 100644
--- a/static/index.html
+++ b/static/index.html
@@ -219,8 +219,8 @@
       }, { once: true });
     })();
   </script>
-  <link rel="stylesheet" href="/static/style.css?v=20260630emailhtmlquote">
-  <link rel="modulepreload" href="/static/app.js?v=20260630emailhtmlquote">
+  <link rel="stylesheet" href="/static/style.css?v=20260630mdfontsize">
+  <link rel="modulepreload" href="/static/app.js?v=20260630mdfontsize">
   <link rel="modulepreload" href="/static/js/chat.js">
   <link rel="modulepreload" href="/static/js/ui.js">
   <link rel="modulepreload" href="/static/js/sessions.js">
@@ -2512,7 +2512,7 @@
 <script type="module" src="/static/js/settings.js"></script>
 <script type="module" src="/static/js/admin.js"></script>
 <script type="module" src="/static/js/assistant.js"></script>
-<script type="module" src="/static/app.js?v=20260630emailhtmlquote"></script>  <!-- app.js must be LAST -->
+<script type="module" src="/static/app.js?v=20260630mdfontsize"></script>  <!-- app.js must be LAST -->
 <script type="module" src="/static/js/init.js"></script>
 <script type="module" src="/static/js/a11y.js"></script>
 <script nonce="{{CSP_NONCE}}">if('serviceWorker' in navigator){navigator.serviceWorker.register('/static/sw.js').catch(()=>{});}</script>
diff --git a/static/js/document.js b/static/js/document.js
index 65599bc71..b245ec852 100644
--- a/static/js/document.js
+++ b/static/js/document.js
@@ -2223,6 +2223,12 @@ import { bindMenuDismiss, dismissOrRemove } from './escMenuStack.js';
     document.querySelectorAll('.md-toolbar-edit-only').forEach(el => {
       el.style.display = (lang === 'markdown' && _mdActive) ? 'none' : '';
     });
+    const fsBtn = document.getElementById('doc-fontsize-btn');
+    if (fsBtn) {
+      const doc = activeDocId && docs.get(activeDocId);
+      const isPdfDoc = !!(doc && _isFormBackedDoc(doc.content || ''));
+      fsBtn.style.display = (isPdfDoc || (lang === 'markdown' && _mdActive)) ? 'none' : '';
+    }
     const mdToolbar = document.getElementById('doc-md-toolbar');
     if (mdToolbar) {
       mdToolbar.classList.toggle('md-preview-active', lang === 'markdown' && !!_mdActive);
diff --git a/static/sw.js b/static/sw.js
index 18beb4456..df2d3aeae 100644
--- a/static/sw.js
+++ b/static/sw.js
@@ -7,7 +7,7 @@
 //   - Other static assets (images/fonts/libs): cache-first with bg refresh.
 //   - API / non-GET: never cached.
 // Bump CACHE_NAME whenever the precache list or SW logic changes.
-const CACHE_NAME = 'odysseus-v335';
+const CACHE_NAME = 'odysseus-v336';
 
 // Core shell precached on install so repeat opens are instant without any
 // network wait. Keep this list in sync with the <script type="module"> tags