--- a/browser/components/preferences/in-content/advanced.xul
+++ b/browser/components/preferences/in-content/advanced.xul
@@ -325,17 +325,17 @@
           </vbox>
         </hbox>
       </groupbox>
 
       <!-- Site Data -->
       <groupbox id="siteDataGroup" hidden="true">
         <caption><label>&siteData.label;</label></caption>
 
-        <hbox align="center">
+        <hbox align="baseline">
           <label id="totalSiteDataSize"></label>
           <label id="siteDataLearnMoreLink" class="learnMore text-link" value="&siteDataLearnMoreLink.label;"></label>
           <spacer flex="1" />
           <button id="clearSiteDataButton" icon="clear"
                   label="&clearSiteData.label;" accesskey="&clearSiteData.accesskey;"/>
         </hbox>
         <vbox align="end">
           <button id="siteDataSettings"