added private mode and adjusted user dir

main.py

@@ -1,3 +1,5 @@
+import tempfile
+
 from selenium import webdriver
 from selenium.webdriver.chrome.options import Options
 from selenium.webdriver.common.by import By
@@ -53,6 +55,10 @@ def check_books(user, pw, recipient_email):
     options.add_argument("--disable-gpu")  # Disable GPU acceleration
     options.add_argument("--no-sandbox")  # Required for some environments
     options.add_argument("--incognito")
+    # Use a unique temporary user-data-dir
+    temp_dir = tempfile.mkdtemp()
+    options.add_argument(f"--user-data-dir={temp_dir}")
+
     driver = webdriver.Chrome(options=options)  # Use ChromeDriver
 
     try: