diff --git a/common/content/options.js b/common/content/options.js
index 555b9eaf..e5e71121 100644
--- a/common/content/options.js
+++ b/common/content/options.js
@@ -508,26 +508,6 @@ function Options() //{{{
             }
         });
 
-    commands.add(["pref[erences]", "prefs"],
-        "Show " + config.hostApplication + " preferences",
-        function (args)
-        {
-            if (args.bang) // open Firefox settings GUI dialog
-            {
-                liberator.open("about:config",
-                    (options["newtab"] && options.get("newtab").has("all", "prefs"))
-                            ? liberator.NEW_TAB : liberator.CURRENT_TAB);
-            }
-            else
-            {
-                window.openPreferences();
-            }
-        },
-        {
-            argCount: "0",
-            bang: true
-        });
-
     commands.add(["setl[ocal]"],
         "Set local option",
         function (args)
diff --git a/muttator/content/config.js b/muttator/content/config.js
index 1b811ae8..5e3be8b0 100644
--- a/muttator/content/config.js
+++ b/muttator/content/config.js
@@ -219,6 +219,16 @@ const config = { //{{{
             liberator.loadModule("marks",       Marks);
             liberator.loadModule("hints",       Hints);
         }
+
+        commands.add(["pref[erences]", "prefs"],
+            "Show " + config.hostApplication + " preferences",
+            function (args)
+            {
+                window.openOptionsDialog();
+            },
+            {
+                argCount: "0"
+            });
     }
 }; //}}}
 
diff --git a/vimperator/content/config.js b/vimperator/content/config.js
index ee06ad32..14bbb092 100644
--- a/vimperator/content/config.js
+++ b/vimperator/content/config.js
@@ -314,6 +314,26 @@ const config = { //{{{
                 literal: 0
             });
 
+        commands.add(["pref[erences]", "prefs"],
+            "Show " + config.hostApplication + " preferences",
+            function (args)
+            {
+                if (args.bang) // open Firefox settings GUI dialog
+                {
+                    liberator.open("about:config",
+                        (options["newtab"] && options.get("newtab").has("all", "prefs"))
+                                ? liberator.NEW_TAB : liberator.CURRENT_TAB);
+                }
+                else
+                {
+                    window.openPreferences();
+                }
+            },
+            {
+                argCount: "0",
+                bang: true
+            });
+
         commands.add(["redr[aw]"],
             "Redraw the screen",
             function ()