diff --git a/bot_z/operator.py b/bot_z/operator.py
index 77d3d6f..7a4571a 100644
--- a/bot_z/operator.py
+++ b/bot_z/operator.py
@@ -121,6 +121,7 @@ class Operator(wd.Firefox):
         self.profile.set_preference("datareporting.policy.dataSubmissionEnabled", False)
         self.profile.set_preference("datareporting.healthreport.service.enabled", False)
         self.profile.set_preference("datareporting.healthreport.uploadEnabled", False)
+        self.profile.set_preference("dom.webnotifications.enabled", False)
 
         self.opts = wd.firefox.options.Options()
         self.opts.headless = headless
@@ -289,8 +290,10 @@ class Operator(wd.Firefox):
                     tuple(i.strip() for i in data if i.strip())
                 )
         except NoSuchElementException:
-            return []
-        return result
+            result = []
+        finally:
+            self.switch_to_default_content()
+        return result  # type: ignore
 
     @property
     def checked_in(self) -> bool:
@@ -321,6 +324,7 @@ class Operator(wd.Firefox):
         self._switch_to_container()
         enter_butt = self.find_element_by_xpath('//input[@value="Entrata"]')
         enter_butt.click()
+        self.switch_to_default_content()
 
     @safely(RETRIES)
     def check_out(self, force: bool = False) -> None:
@@ -337,6 +341,7 @@ class Operator(wd.Firefox):
         self._switch_to_container()
         exit_butt = self.find_element_by_xpath('//input[@value="Uscita"]')
         exit_butt.click()
+        self.switch_to_default_content()
 
     def __del__(self) -> None:
         self.quit()