--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -141,16 +141,17 @@
     <tooltip id="remoteBrowserTooltip"/>
 
     <!-- for search and content formfill/pw manager -->
 
     <panel type="autocomplete-richlistbox"
            id="PopupAutoComplete"
            noautofocus="true"
            hidden="true"
+           overflowpadding="4"
            norolluponanchor="true" />
 
     <!-- for search with one-off buttons -->
     <panel type="autocomplete" id="PopupSearchAutoComplete" noautofocus="true" hidden="true"/>
 
     <!-- for url bar autocomplete -->
     <panel type="autocomplete-richlistbox"
            id="PopupAutoCompleteRichResult"