--- a/browser/components/customizableui/content/panelUI.inc.xul
+++ b/browser/components/customizableui/content/panelUI.inc.xul
@@ -141,17 +141,17 @@
                     showAllTooltipText="&appMenuRemoteTabs.showAll.tooltip;"
                     showMoreLabel="&appMenuRemoteTabs.showMore.label;"
                     showMoreTooltipText="&appMenuRemoteTabs.showMore.tooltip;"
                     notabsforclientlabel="&appMenuRemoteTabs.notabs.label;"
                     />
             </vbox>
             <!-- Sync is ready to Sync but the "tabs" engine isn't enabled-->
             <hbox id="PanelUI-remotetabs-tabsdisabledpane" pack="center" flex="1">
-              <vbox class="PanelUI-remotetabs-instruction-box">
+              <vbox class="PanelUI-remotetabs-instruction-box" align="center">
                 <hbox pack="center">
                   <html:img class="fxaSyncIllustration" src="chrome://browser/skin/fxa/sync-illustration.svg"/>
                 </hbox>
                 <label class="PanelUI-remotetabs-instruction-label">&appMenuRemoteTabs.tabsnotsyncing.label;</label>
                 <hbox pack="center">
                   <toolbarbutton class="PanelUI-remotetabs-prefs-button"
                                  label="&appMenuRemoteTabs.openprefs.label;"
                                  oncommand="gSyncUI.openPrefs('synced-tabs');"/>