diff --git a/addon/chrome/content/preferences/appearance.xhtml b/addon/chrome/content/preferences/appearance.xhtml
index 63c9c7b9..1535419a 100644
--- a/addon/chrome/content/preferences/appearance.xhtml
+++ b/addon/chrome/content/preferences/appearance.xhtml
@@ -150,13 +150,15 @@
                 </menulist>
               </hbox>
             </box>
-            <vbox id="multi-rows" class="indent" style="height: 54px;">
-              <hbox align="center" id="maxbar">
-                <label value="&maxrow.label;" TSTdisabled="true"/>
-                <html:input id="maxrow" size="2" maxlength="2" preference="pref_maxrow" type="number" required="required" min="2"/>
-              </hbox>
-              <checkbox_tmp id="pinnedTabScroll" label="&pinnedTabScroll.label;"
-                            preference="pref_pinnedTabScroll"/>
+            <vbox style="height: 54px;">
+              <vbox id="multi-rows" class="indent">
+                <hbox align="center" id="maxbar">
+                  <label value="&maxrow.label;" TSTdisabled="true"/>
+                  <html:input id="maxrow" size="2" maxlength="2" preference="pref_maxrow" type="number" required="required" min="2"/>
+                </hbox>
+                <checkbox_tmp id="pinnedTabScroll" label="&pinnedTabScroll.label;"
+                              preference="pref_pinnedTabScroll"/>
+              </vbox>
             </vbox>
             <checkbox_tmp id="smoothScroll" label="&smoothScroll.label;" preference="pref_smoothScroll"/>
             <hbox align="center" id="clickToScroll.scrollDelay">
diff --git a/addon/chrome/content/preferences/session.js b/addon/chrome/content/preferences/session.js
index 446df469..f2928c38 100644
--- a/addon/chrome/content/preferences/session.js
+++ b/addon/chrome/content/preferences/session.js
@@ -7,6 +7,9 @@ var gSessionPane = {
     if (TabmixSvc.isLinux)
       $("sessionManager-panels").setAttribute("linux", "true");
 
+    // while we don't use session manager always set `Advanced Setting` as selected tab
+    $("session").selectedIndex = 2;
+
     this.isSessionStoreEnabled(true);
     this.updateSessionShortcuts();
 
diff --git a/addon/chrome/skin/tabmix-preferences.css b/addon/chrome/skin/tabmix-preferences.css
index 79f4d873..e701a8b0 100644
--- a/addon/chrome/skin/tabmix-preferences.css
+++ b/addon/chrome/skin/tabmix-preferences.css
@@ -185,7 +185,6 @@ tab.subtabs:focus-visible > .tab-middle > .tab-text {
 }
 
 #TabMIxPreferences:not([ubuntu]) .groupbox-panels:not(.tabclick) {
-  appearance: groupbox;
   padding: 3px 3px 6px 3px;
 }
 
@@ -324,7 +323,6 @@ tabbox > tabpanels:last-child {
 }
 
 #TabMIxPreferences[mac] prefpane .groupbox-body {
-  appearance: groupbox;
   padding-top: 2px;
   margin-bottom: 2px;
 }