--- a/browser/components/preferences/in-content-new/search.xul
+++ b/browser/components/preferences/in-content-new/search.xul
@@ -25,19 +25,21 @@
           data-category="paneSearch">
       <label class="header-name" flex="1">&paneSearch.title;</label>
     </hbox>
 
     <!-- Default Search Engine -->
     <groupbox id="defaultEngineGroup" data-category="paneSearch">
       <caption label="&defaultSearchEngine.label;"/>
       <label>&chooseYourDefaultSearchEngine2.label;</label>
-      <menulist id="defaultEngine">
-        <menupopup/>
-      </menulist>
+      <hbox>
+        <menulist id="defaultEngine">
+          <menupopup/>
+        </menulist>
+      </hbox>
       <checkbox id="suggestionsInSearchFieldsCheckbox"
                 label="&provideSearchSuggestions.label;"
                 accesskey="&provideSearchSuggestions.accesskey;"
                 preference="browser.search.suggest.enabled"/>
       <vbox class="indent">
         <checkbox id="urlBarSuggestion" label="&showURLBarSuggestions2.label;"
                   accesskey="&showURLBarSuggestions2.accesskey;"
                   preference="browser.urlbar.suggest.searches"/>