diff --git a/electron/webview-preload.js b/electron/webview-preload.js
index 421ec2c8..ab4aa519 100644
--- a/electron/webview-preload.js
+++ b/electron/webview-preload.js
@@ -177,6 +177,35 @@ try {
   window.addEventListener('wheel', onWheelCapture, { capture: true, passive: false });
   document.addEventListener('wheel', onWheelCapture, { capture: true, passive: false });
 
+  // ---------------------------------------------------------------------------
+  // Double-click to fit the browser card (parity with agent-chat dblclick).
+  //
+  // A <webview> is an out-of-process guest, so a dblclick inside it never
+  // reaches the embedding renderer and the dashboard's card dblclick-to-fit
+  // never fires over page content. Forward non-interactive dblclicks to the
+  // host (BrowserCard's ipc-message handler calls onDoubleClick -> fitToCards).
+  // We never preventDefault: the page keeps its native behavior. We skip
+  // interactive targets and skip when the dblclick selected a word, so links/
+  // buttons/inputs and native word-select win there. canvas is treated as
+  // interactive on purpose (maps/games/design tools use dblclick meaningfully).
+  const INTERACTIVE_DBLCLICK_SELECTOR = [
+    'a[href]', 'button', 'input', 'textarea', 'select', 'option', 'label',
+    'summary', 'details', 'video', 'audio', 'iframe', 'embed', 'object', 'canvas',
+    '[contenteditable=""]', '[contenteditable="true"]',
+    '[role="button"]', '[role="link"]', '[role="textbox"]', '[role="menuitem"]',
+    '[role="tab"]', '[role="checkbox"]', '[role="radio"]', '[role="switch"]', '[role="slider"]',
+  ].join(',');
+  const onDblClickCapture = (e) => {
+    try {
+      const t = e.target;
+      if (t && t.closest && t.closest(INTERACTIVE_DBLCLICK_SELECTOR)) return;
+      const sel = window.getSelection && window.getSelection();
+      if (sel && String(sel).trim().length > 0) return;
+      ipcRenderer.sendToHost('browser-dblclick');
+    } catch (_) {}
+  };
+  document.addEventListener('dblclick', onDblClickCapture, { capture: true });
+
   // ---------------------------------------------------------------------------
   // [FRONTEND] console capture for the App Builder Terminal pane.
   //
diff --git a/frontend/src/app/pages/Dashboard/cards/BrowserCard.tsx b/frontend/src/app/pages/Dashboard/cards/BrowserCard.tsx
index f21d1ce4..31862f43 100644
--- a/frontend/src/app/pages/Dashboard/cards/BrowserCard.tsx
+++ b/frontend/src/app/pages/Dashboard/cards/BrowserCard.tsx
@@ -192,6 +192,10 @@ const BrowserCard: React.FC<Props> = ({
 }) => {
   const c = useClaudeTokens();
   const dispatch = useAppDispatch();
+  // Read via ref inside the webview-attach effect so a new onDoubleClick identity
+  // doesn't re-run that effect (which would re-register the webview).
+  const onDoubleClickRef = useRef(onDoubleClick);
+  onDoubleClickRef.current = onDoubleClick;
   const scrollOverlayRef = useOverlayScrollPassthrough(isSelected);
   const browserHomepage = useAppSelector((state) => state.settings.data.browser_homepage);
   const elementSelectionCtx = useElementSelection();
@@ -308,6 +312,8 @@ const BrowserCard: React.FC<Props> = ({
         // No unconditional log; forwarded webview-console messages were causing 100s of host warns/sec and main-thread stalls.
         if (e?.channel === 'passkey-detected') {
           setPasskeyDialogOpen(true);
+        } else if (e?.channel === 'browser-dblclick') {
+          onDoubleClickRef.current?.(browserId, 'browser');
         } else if (e?.channel === 'canvas-wheel-zoom') {
           // Convert guest coords to doc coords and dispatch a CustomEvent; synthetic WheelEvent bubble was unreliable through GuestView.
           const payload = e.args?.[0] || {};