--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -94,20 +94,20 @@
     <menupopup id="backForwardMenu"
                chromedir="&locale.dir;"
                onpopupshowing="return FillHistoryMenu(event.target);"
                oncommand="gotoHistoryIndex(event);"
                onclick="checkForMiddleClick(this, event);"/>
     <tooltip id="aHTMLTooltip" onpopupshowing="return FillInHTMLTooltip(document.tooltipNode);"/>
 
     <!-- for search and content formfill/pw manager -->
-    <panel type="autocomplete" chromedir="&locale.dir;" id="PopupAutoComplete" noautofocus="true" hidden="true" level="top"/>
+    <panel type="autocomplete" chromedir="&locale.dir;" id="PopupAutoComplete" noautofocus="true" hidden="true"/>
 
     <!-- for url bar autocomplete -->
-    <panel type="autocomplete-richlistbox" chromedir="&locale.dir;" id="PopupAutoCompleteRichResult" noautofocus="true" hidden="true" level="top"/>
+    <panel type="autocomplete-richlistbox" chromedir="&locale.dir;" id="PopupAutoCompleteRichResult" noautofocus="true" hidden="true"/>
 
     <panel id="editBookmarkPanel"
            orient="vertical"
            ignorekeys="true"
            hidden="true"
            onpopupshown="StarUI.panelShown(event);"
            aria-labelledby="editBookmarkPanelTitle">
       <hbox flex="1" align="top">

--- a/toolkit/content/widgets/autocomplete.xml
+++ b/toolkit/content/widgets/autocomplete.xml
@@ -557,17 +557,17 @@
   </binding>
 
   <binding id="autocomplete-result-popup" extends="chrome://global/content/bindings/autocomplete.xml#autocomplete-base-popup">
     <resources>
       <stylesheet src="chrome://global/skin/tree.css"/>
       <stylesheet src="chrome://global/skin/autocomplete.css"/>
     </resources>
 
-    <content ignorekeys="true">
+    <content ignorekeys="true" level="top">
       <xul:tree anonid="tree" class="autocomplete-tree plain" hidecolumnpicker="true" flex="1" seltype="single">
         <xul:treecols anonid="treecols">
           <xul:treecol id="treecolAutoCompleteValue" class="autocomplete-treecol" flex="1" overflow="true"/>
         </xul:treecols>
         <xul:treechildren class="autocomplete-treebody"/>
       </xul:tree>
     </content>
 
@@ -900,17 +900,17 @@
     </handlers>
   </binding>
 
   <binding id="autocomplete-rich-result-popup" extends="chrome://global/content/bindings/autocomplete.xml#autocomplete-base-popup">
     <resources>
       <stylesheet src="chrome://global/skin/autocomplete.css"/>
     </resources>
 
-    <content ignorekeys="true">
+    <content ignorekeys="true" level="top">
       <xul:richlistbox anonid="richlistbox" class="autocomplete-richlistbox" flex="1"/>
       <xul:hbox>
         <children/>
       </xul:hbox>
     </content>
 
     <implementation implements="nsIAutoCompletePopup">
       <field name="_currentIndex">0</field>