diff --git a/common/modules/sanitizer.jsm b/common/modules/sanitizer.jsm
index be0629dc..2e0ccda6 100644
--- a/common/modules/sanitizer.jsm
+++ b/common/modules/sanitizer.jsm
@@ -151,7 +151,7 @@ var Sanitizer = Module("sanitizer", XPCOM([Ci.nsIObserver, Ci.nsISupportsWeakRef
                     // "Allow this site to open popups" ...
                     services.permissions.removeAll();
                     // Zoom level, ...
-                    services.contentPrefs.removeGroupedPrefs();
+                    services.contentPrefs.removeAllDomains(null);
                 }
 
                 // "Never remember passwords" ...