diff --git a/packages/extension/public/manifest.json b/packages/extension/public/manifest.json
index 00bd8d38..02eed2f8 100644
--- a/packages/extension/public/manifest.json
+++ b/packages/extension/public/manifest.json
@@ -10,7 +10,6 @@
     "debugger",
     "storage",
     "windows",
-    "alarms",
     "scripting",
     "tabCapture",
     "webNavigation",
diff --git a/packages/extension/src/background.ts b/packages/extension/src/background.ts
index a2fa883f..b7bcfb47 100644
--- a/packages/extension/src/background.ts
+++ b/packages/extension/src/background.ts
@@ -116,14 +116,6 @@ chrome.management.getSelf().then(async (info) => {
   }
 });
 
-// Re-check offscreen doc periodically — Chrome may kill it after idle.
-chrome.alarms.create('ensure-offscreen', { periodInMinutes: 1 });
-chrome.alarms.onAlarm.addListener((alarm) => {
-  if (alarm.name === 'ensure-offscreen') {
-    ensureOffscreenRelay().catch(() => {});
-  }
-});
-
 // ─── Settings + Action (sidepanel / popup) ───────────────────────────────────
 
 // Disable auto-open so action.onClicked fires (Chrome persists this across reloads)