diff --git a/assets/chrome-extension/background.js b/assets/chrome-extension/background.js
index c78f2c7c452..4ebad96b0fe 100644
--- a/assets/chrome-extension/background.js
+++ b/assets/chrome-extension/background.js
@@ -277,12 +277,24 @@ async function reannounceAttachedTabs() {
     }
 
     // Send fresh attach event to relay.
+    // Split into two try-catch blocks so debugger failures and relay send
+    // failures are handled independently. Previously, a relay send failure
+    // would fall into the outer catch and set the badge to 'on' even though
+    // the relay had no record of the tab — causing every subsequent browser
+    // tool call to fail with "no tab connected" until the next reconnect cycle.
+    let targetInfo
     try {
       const info = /** @type {any} */ (
         await chrome.debugger.sendCommand({ tabId }, 'Target.getTargetInfo')
       )
-      const targetInfo = info?.targetInfo
+      targetInfo = info?.targetInfo
+    } catch {
+      // Target.getTargetInfo failed. Preserve at least targetId from
+      // cached tab state so relay receives a stable identifier.
+      targetInfo = tab.targetId ? { targetId: tab.targetId } : undefined
+    }
 
+    try {
       sendToRelay({
         method: 'forwardCDPEvent',
         params: {
@@ -301,7 +313,15 @@ async function reannounceAttachedTabs() {
         title: 'OpenClaw Browser Relay: attached (click to detach)',
       })
     } catch {
-      setBadge(tabId, 'on')
+      // Relay send failed (e.g. WS closed in the gap between ensureRelayConnection
+      // resolving and this loop executing). The tab is still valid — leave badge
+      // as 'connecting' so the reconnect/keepalive cycle will retry rather than
+      // showing a false-positive 'on' that hides the broken state from the user.
+      setBadge(tabId, 'connecting')
+      void chrome.action.setTitle({
+        tabId,
+        title: 'OpenClaw Browser Relay: relay reconnecting…',
+      })
     }
   }
 
@@ -769,7 +789,11 @@ async function onDebuggerDetach(source, reason) {
     title: 'OpenClaw Browser Relay: re-attaching after navigation…',
   })
 
-  const delays = [300, 700, 1500]
+  // Extend re-attach window from 2.5 s to ~7.7 s (5 attempts).
+  // SPAs and pages with heavy JS can take >2.5 s before the Chrome debugger
+  // is attachable, causing all three original attempts to fail and leaving
+  // the badge permanently off after every navigation.
+  const delays = [200, 500, 1000, 2000, 4000]
   for (let attempt = 0; attempt < delays.length; attempt++) {
     await new Promise((r) => setTimeout(r, delays[attempt]))