diff --git a/src/core/browser.test.ts b/src/core/browser.test.ts
new file mode 100644
index 0000000..42df3f4
--- /dev/null
+++ b/src/core/browser.test.ts
@@ -0,0 +1,24 @@
+import { describe, it, expect, vi } from 'vitest'
+import { openInBrowser } from './browser.js'
+
+describe('openInBrowser', () => {
+  it('calls provided opener with the target URL', async () => {
+    const openUrl = vi.fn(async (_url: string) => undefined)
+    const url = 'https://www.pixelmuse.studio/g/abc123'
+
+    await openInBrowser(url, { openUrl })
+
+    expect(openUrl).toHaveBeenCalledTimes(1)
+    expect(openUrl).toHaveBeenCalledWith(url)
+  })
+
+  it('propagates opener failures to caller', async () => {
+    const openUrl = vi.fn(async (_url: string) => {
+      throw new Error('No browser available')
+    })
+
+    await expect(
+      openInBrowser('https://www.pixelmuse.studio/g/abc123', { openUrl }),
+    ).rejects.toThrow('No browser available')
+  })
+})
diff --git a/src/core/browser.ts b/src/core/browser.ts
new file mode 100644
index 0000000..0a09a90
--- /dev/null
+++ b/src/core/browser.ts
@@ -0,0 +1,13 @@
+import open from 'open'
+
+interface OpenInBrowserOptions {
+  openUrl?: (url: string) => Promise<unknown>
+}
+
+/**
+ * Open a URL in the system browser.
+ */
+export async function openInBrowser(url: string, options: OpenInBrowserOptions = {}): Promise<void> {
+  const openUrl = options.openUrl ?? ((target: string) => open(target))
+  await openUrl(url)
+}
diff --git a/src/core/index.ts b/src/core/index.ts
index c1d5d55..a7e5be7 100644
--- a/src/core/index.ts
+++ b/src/core/index.ts
@@ -38,3 +38,4 @@ export { timeAgo } from './utils.js'
 export { initiateDeviceAuth, pollForToken } from './device-auth.js'
 export { detectEditors, configureMcp, type EditorInfo } from './mcp-config.js'
 export { buildMacClipboardArgs } from './clipboard.js'
+export { openInBrowser } from './browser.js'
diff --git a/src/screens/GalleryDetail.tsx b/src/screens/GalleryDetail.tsx
index 5953137..330b216 100644
--- a/src/screens/GalleryDetail.tsx
+++ b/src/screens/GalleryDetail.tsx
@@ -1,9 +1,9 @@
 import React, { useState, useEffect } from 'react'
 import { Box, Text, useInput } from 'ink'
 import { ConfirmInput, Spinner } from '@inkjs/ui'
-import open from 'open'
 import type { PixelmuseClient } from '../core/client.js'
 import type { Generation } from '../core/types.js'
+import { openInBrowser } from '../core/browser.js'
 import { imageToBuffer, autoSave } from '../core/image.js'
 import ImagePreview from '../components/ImagePreview.js'
 
@@ -49,7 +49,9 @@ export default function GalleryDetail({ client, generationId, back }: Props) {
     if (confirming) return
     if (input === 'd') setConfirming(true)
     if (input === 'o' && generation) {
-      open(`https://www.pixelmuse.studio/g/${generation.id}`)
+      void openInBrowser(`https://www.pixelmuse.studio/g/${generation.id}`).catch((err: unknown) => {
+        setError(err instanceof Error ? err.message : 'Failed to open browser')
+      })
     }
   })