Enable persistent webkit storage

qutebrowser/app.py

@@ -125,7 +125,7 @@ class QuteBrowser(QApplication):
             # We didn't really initialize much so far, so we just quit hard.
             sys.exit(1)
         self.config = config.instance
-        websettings.init()
+        websettings.init(self._dirs.user_cache_dir)
 
         self.commandmanager = CommandManager()
         self.searchmanager = SearchManager()

qutebrowser/config/websettings.py

@@ -101,9 +101,14 @@ STATIC_SETTERS = {
 settings = None
 
 
-def init():
-    """Initialize the global QWebSettings."""
+def init(cachedir):
+    """Initialize the global QWebSettings.
+
+    Args:
+        cachedir: Directory to save cache files in.
+    """
     global settings
+    QWebSettings.enablePersistentStorage(cachedir)
     settings = QWebSettings.globalSettings()
     for name, item in ATTRIBUTES.items():
         settings.setAttribute(item, config.get('webkit', name))