diff --git a/easybot_windows_agent/main.py b/easybot_windows_agent/main.py
index 11567c1..91f16bc 100644
--- a/easybot_windows_agent/main.py
+++ b/easybot_windows_agent/main.py
@@ -577,14 +577,29 @@ async def tool_open_browser(args: dict[str, Any]) -> dict[str, Any]:
             _browser_process.terminate()
             await asyncio.sleep(0.5)
 
+        # Use a separate user-data-dir to avoid conflicts with existing browser instances
+        import tempfile
+        cdp_profile = os.path.join(tempfile.gettempdir(), "easybot_cdp_profile")
+        os.makedirs(cdp_profile, exist_ok=True)
+
         _browser_process = subprocess.Popen(
             [browser_exe, f"--remote-debugging-port={port}",
-             "--no-first-run", "--no-default-browser-check", url],
+             f"--user-data-dir={cdp_profile}",
+             "--no-first-run", "--no-default-browser-check",
+             "--disable-extensions", "--disable-popup-blocking", url],
             stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
             creationflags=subprocess.CREATE_NO_WINDOW if sys.platform == "win32" else 0,
         )
-        # Wait a bit for CDP to be ready
-        await asyncio.sleep(2)
+        # Wait for CDP to be ready (may take longer on first launch)
+        for _ in range(6):
+            await asyncio.sleep(1)
+            try:
+                reader, writer = await asyncio.open_connection("127.0.0.1", port)
+                writer.close()
+                await writer.wait_closed()
+                break
+            except OSError:
+                continue
 
         # Verify CDP is listening
         try: