diff --git a/browser_use/agent/prompts.py b/browser_use/agent/prompts.py
index 974f62d16..829e3d4c2 100644
--- a/browser_use/agent/prompts.py
+++ b/browser_use/agent/prompts.py
@@ -266,11 +266,19 @@ class AgentMessagePrompt:
 		if self.include_recent_events and self.browser_state.recent_events:
 			recent_events_text = f'Recent browser events: {self.browser_state.recent_events}\n'
 
+		# Add closed popup messages if any
+		closed_popups_text = ''
+		if self.browser_state.closed_popup_messages:
+			closed_popups_text = 'Auto-closed JavaScript dialogs:\n'
+			for popup_msg in self.browser_state.closed_popup_messages:
+				closed_popups_text += f'  - {popup_msg}\n'
+			closed_popups_text += '\n'
+
 		browser_state = f"""{stats_text}{current_tab_text}
 Available tabs:
 {tabs_text}
 {page_info_text}
-{recent_events_text}{pdf_message}Interactive elements{truncated_text}:
+{recent_events_text}{closed_popups_text}{pdf_message}Interactive elements{truncated_text}:
 {elements_text}
 """
 		return browser_state
diff --git a/browser_use/browser/session.py b/browser_use/browser/session.py
index 60c975147..bfe2e03df 100644
--- a/browser_use/browser/session.py
+++ b/browser_use/browser/session.py
@@ -315,6 +315,7 @@ class BrowserSession(BaseModel):
 	_cached_browser_state_summary: Any = PrivateAttr(default=None)
 	_cached_selector_map: dict[int, EnhancedDOMTreeNode] = PrivateAttr(default_factory=dict)
 	_downloaded_files: list[str] = PrivateAttr(default_factory=list)  # Track files downloaded during this session
+	_closed_popup_messages: list[str] = PrivateAttr(default_factory=list)  # Store messages from auto-closed JavaScript dialogs
 
 	# Watchdogs
 	_crash_watchdog: Any | None = PrivateAttr(default=None)
diff --git a/browser_use/browser/views.py b/browser_use/browser/views.py
index da222b61d..43ff2a74b 100644
--- a/browser_use/browser/views.py
+++ b/browser_use/browser/views.py
@@ -107,6 +107,7 @@ class BrowserStateSummary:
 	recent_events: str | None = None  # Text summary of recent browser events
 	pending_network_requests: list[NetworkRequest] = field(default_factory=list)  # Currently loading network requests
 	pagination_buttons: list[PaginationButton] = field(default_factory=list)  # Detected pagination buttons
+	closed_popup_messages: list[str] = field(default_factory=list)  # Messages from auto-closed JavaScript dialogs
 
 
 @dataclass
diff --git a/browser_use/browser/watchdogs/dom_watchdog.py b/browser_use/browser/watchdogs/dom_watchdog.py
index 48e79b7ff..4216c6fe9 100644
--- a/browser_use/browser/watchdogs/dom_watchdog.py
+++ b/browser_use/browser/watchdogs/dom_watchdog.py
@@ -349,6 +349,7 @@ class DOMWatchdog(BaseWatchdog):
 					recent_events=self._get_recent_events_str() if event.include_recent_events else None,
 					pending_network_requests=[],  # Empty page has no pending requests
 					pagination_buttons=[],  # Empty page has no pagination
+					closed_popup_messages=self.browser_session._closed_popup_messages.copy(),
 				)
 
 			# Execute DOM building and screenshot capture in parallel
@@ -504,6 +505,7 @@ class DOMWatchdog(BaseWatchdog):
 				recent_events=self._get_recent_events_str() if event.include_recent_events else None,
 				pending_network_requests=pending_requests,
 				pagination_buttons=pagination_buttons_data,
+				closed_popup_messages=self.browser_session._closed_popup_messages.copy(),
 			)
 
 			# Cache the state
@@ -541,6 +543,7 @@ class DOMWatchdog(BaseWatchdog):
 				recent_events=None,
 				pending_network_requests=[],  # Error state has no pending requests
 				pagination_buttons=[],  # Error state has no pagination
+				closed_popup_messages=self.browser_session._closed_popup_messages.copy() if hasattr(self, 'browser_session') else [],
 			)
 
 	@time_execution_async('build_dom_tree_without_highlights')
diff --git a/browser_use/browser/watchdogs/popups_watchdog.py b/browser_use/browser/watchdogs/popups_watchdog.py
index 20904dfac..7974c0b09 100644
--- a/browser_use/browser/watchdogs/popups_watchdog.py
+++ b/browser_use/browser/watchdogs/popups_watchdog.py
@@ -65,6 +65,12 @@ class PopupsWatchdog(BaseWatchdog):
 					dialog_type = event_data.get('type', 'alert')
 					message = event_data.get('message', '')
 
+					# Store the popup message in browser session for inclusion in browser state
+					if message:
+						formatted_message = f"[{dialog_type}] {message}"
+						self.browser_session._closed_popup_messages.append(formatted_message)
+						self.logger.debug(f"📝 Stored popup message: {formatted_message[:100]}")
+
 					# Choose action based on dialog type:
 					# - alert: accept=true (click OK to dismiss)
 					# - confirm: accept=true (click OK to proceed - safer for automation)