diff --git a/src/App.tsx b/src/App.tsx
index e0fad570..1eb4a8e6 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -155,23 +155,33 @@ function App() {
     navFromHistoryRef.current = false
   }, [notes.activeTabPath]) // eslint-disable-line react-hooks/exhaustive-deps -- navHistory.push is stable
 
-  const isTabOpen = useCallback((path: string) => notes.tabs.some(t => t.entry.path === path), [notes.tabs])
+  const isEntryExists = useCallback((path: string) => vault.entries.some(e => e.path === path), [vault.entries])
 
   const handleGoBack = useCallback(() => {
-    const target = navHistory.goBack(isTabOpen)
+    const target = navHistory.goBack(isEntryExists)
     if (target) {
       navFromHistoryRef.current = true
-      notes.handleSwitchTab(target)
+      if (notes.tabs.some(t => t.entry.path === target)) {
+        notes.handleSwitchTab(target)
+      } else {
+        const entry = vault.entries.find(e => e.path === target)
+        if (entry) notes.handleSelectNote(entry)
+      }
     }
-  }, [navHistory, isTabOpen, notes])
+  }, [navHistory, isEntryExists, vault.entries, notes])
 
   const handleGoForward = useCallback(() => {
-    const target = navHistory.goForward(isTabOpen)
+    const target = navHistory.goForward(isEntryExists)
     if (target) {
       navFromHistoryRef.current = true
-      notes.handleSwitchTab(target)
+      if (notes.tabs.some(t => t.entry.path === target)) {
+        notes.handleSwitchTab(target)
+      } else {
+        const entry = vault.entries.find(e => e.path === target)
+        if (entry) notes.handleSelectNote(entry)
+      }
     }
-  }, [navHistory, isTabOpen, notes])
+  }, [navHistory, isEntryExists, vault.entries, notes])
 
   // Mouse button 3/4 (back/forward) and macOS trackpad two-finger swipe
   useEffect(() => {
diff --git a/src/components/TabBar.test.tsx b/src/components/TabBar.test.tsx
index 3d638c09..d9b13c13 100644
--- a/src/components/TabBar.test.tsx
+++ b/src/components/TabBar.test.tsx
@@ -215,6 +215,33 @@ describe('TabBar', () => {
     expect(screen.queryByTestId('tab-new-indicator')).not.toBeInTheDocument()
   })
 
+  it('renders nav back/forward buttons', () => {
+    const tabs = makeTabs(['Alpha'])
+    render(<TabBar tabs={tabs} activeTabPath={tabs[0].entry.path} {...defaultProps} />)
+    expect(screen.getByTestId('nav-back')).toBeInTheDocument()
+    expect(screen.getByTestId('nav-forward')).toBeInTheDocument()
+  })
+
+  it('disables nav buttons when canGoBack/canGoForward are false', () => {
+    const tabs = makeTabs(['Alpha'])
+    render(<TabBar tabs={tabs} activeTabPath={tabs[0].entry.path} {...defaultProps} canGoBack={false} canGoForward={false} />)
+    expect(screen.getByTestId('nav-back')).toBeDisabled()
+    expect(screen.getByTestId('nav-forward')).toBeDisabled()
+  })
+
+  it('enables nav buttons and fires handlers on click', () => {
+    const onGoBack = vi.fn()
+    const onGoForward = vi.fn()
+    const tabs = makeTabs(['Alpha'])
+    render(<TabBar tabs={tabs} activeTabPath={tabs[0].entry.path} {...defaultProps} canGoBack canGoForward onGoBack={onGoBack} onGoForward={onGoForward} />)
+
+    fireEvent.click(screen.getByTestId('nav-back'))
+    expect(onGoBack).toHaveBeenCalledTimes(1)
+
+    fireEvent.click(screen.getByTestId('nav-forward'))
+    expect(onGoForward).toHaveBeenCalledTimes(1)
+  })
+
   it('switches tab on click', () => {
     const onSwitchTab = vi.fn()
     const tabs = makeTabs(['Alpha', 'Beta'])
diff --git a/src/hooks/useNavigationHistory.test.ts b/src/hooks/useNavigationHistory.test.ts
index 6b987fd3..60876c39 100644
--- a/src/hooks/useNavigationHistory.test.ts
+++ b/src/hooks/useNavigationHistory.test.ts
@@ -115,6 +115,48 @@ describe('useNavigationHistory', () => {
     expect(result.current.canGoForward).toBe(false)
   })
 
+  it('goBack without predicate returns closed-tab paths (replace scenario)', () => {
+    const { result } = renderHook(() => useNavigationHistory())
+    // Simulate: open A, then B replaces A, then C replaces B
+    act(() => { result.current.push('/a'); result.current.push('/b'); result.current.push('/c') })
+
+    // Without a predicate, goBack returns /b even though its tab was replaced
+    let target: string | null = null
+    act(() => { target = result.current.goBack() })
+    expect(target).toBe('/b')
+
+    act(() => { target = result.current.goBack() })
+    expect(target).toBe('/a')
+  })
+
+  it('goBack with entry-exists predicate skips deleted notes but returns replaced tabs', () => {
+    const { result } = renderHook(() => useNavigationHistory())
+    act(() => { result.current.push('/a'); result.current.push('/deleted'); result.current.push('/c') })
+
+    // Simulate: /deleted was removed from vault, but /a still exists
+    const vaultPaths = new Set(['/a', '/c'])
+    const isEntryExists = (p: string) => vaultPaths.has(p)
+
+    let target: string | null = null
+    act(() => { target = result.current.goBack(isEntryExists) })
+    // Should skip /deleted and return /a
+    expect(target).toBe('/a')
+  })
+
+  it('goForward with entry-exists predicate skips deleted notes', () => {
+    const { result } = renderHook(() => useNavigationHistory())
+    act(() => { result.current.push('/a'); result.current.push('/deleted'); result.current.push('/c') })
+    act(() => { result.current.goBack(); result.current.goBack() })
+
+    const vaultPaths = new Set(['/a', '/c'])
+    const isEntryExists = (p: string) => vaultPaths.has(p)
+
+    let target: string | null = null
+    act(() => { target = result.current.goForward(isEntryExists) })
+    // Should skip /deleted and return /c
+    expect(target).toBe('/c')
+  })
+
   it('handles long navigation chain', () => {
     const { result } = renderHook(() => useNavigationHistory())
     act(() => {