diff --git a/weboob/backends/dlfp/backend.py b/weboob/backends/dlfp/backend.py
index 908f9ea8..81223e4d 100644
--- a/weboob/backends/dlfp/backend.py
+++ b/weboob/backends/dlfp/backend.py
@@ -15,6 +15,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
+from __future__ import with_statement
+
 from weboob.backend import BaseBackend
 from weboob.tools.browser import BrowserUnavailable
 from weboob.capabilities.messages import ICapMessages, ICapMessagesReply, Message
@@ -72,7 +74,8 @@ class DLFPBackend(BaseBackend, ICapMessages, ICapMessagesReply):
                 new = False
 
             try:
-                thread = self.browser.get_content(article.id)
+                with self.browser:
+                    thread = self.browser.get_content(article.id)
             except BrowserUnavailable:
                 continue
 
@@ -111,4 +114,5 @@ class DLFPBackend(BaseBackend, ICapMessages, ICapMessagesReply):
             self.storage.save()
 
     def post_reply(self, thread_id, reply_id, title, message):
-        return self.browser.post_reply(thread_id, reply_id, title, message)
+        with self.browser:
+            return self.browser.post_reply(thread_id, reply_id, title, message)
diff --git a/weboob/backends/fourchan/backend.py b/weboob/backends/fourchan/backend.py
index 4702f16b..9e23cb3a 100644
--- a/weboob/backends/fourchan/backend.py
+++ b/weboob/backends/fourchan/backend.py
@@ -15,6 +15,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
+from __future__ import with_statement
+
 from logging import warning
 
 from weboob.backend import BaseBackend
@@ -60,7 +62,9 @@ class FourChanBackend(BaseBackend, ICapMessages):
             for message in self._iter_thread_messages(board, thread_wanted, only_new):
                 yield message
         else:
-            for thread in self.browser.get_threads(board):
+            with self.browser:
+                threads = self.browser.get_threads(board)
+            for thread in threads:
                 for message in self._iter_thread_messages(board, thread.id, only_new):
                     yield message