diff --git a/weboob/backends/dlfp/backend.py b/weboob/backends/dlfp/backend.py
index 3ca5b5ce..976815d0 100644
--- a/weboob/backends/dlfp/backend.py
+++ b/weboob/backends/dlfp/backend.py
@@ -50,6 +50,10 @@ class DLFPBackend(BaseBackend, ICapMessages, ICapMessagesPost):
         return self.create_browser(self.config['username'], self.config['password'])
 
     def deinit(self):
+        # don't need to logout if the browser hasn't been used.
+        if not self._browser:
+            return
+
         with self.browser:
             self.browser.close_session()
 
diff --git a/weboob/tools/backend.py b/weboob/tools/backend.py
index 89ef09e5..364ae94b 100644
--- a/weboob/tools/backend.py
+++ b/weboob/tools/backend.py
@@ -152,6 +152,8 @@ class BaseBackend(object):
         else:
             return xdg.IconTheme.getIconPath(klass.NAME)
 
+    _browser = None
+
     @property
     def browser(self):
         """
@@ -160,7 +162,7 @@ class BaseBackend(object):
 
         Note that the 'create_default_browser' method is called to create it.
         """
-        if not hasattr(self, '_browser'):
+        if self._browser is None:
             self._browser = self.create_default_browser()
         return self._browser