diff --git a/browser/base/content/browser.xhtml b/browser/base/content/browser.xhtml
index 37a3293a248751..b0347ede7751cf 100644
--- a/browser/base/content/browser.xhtml
+++ b/browser/base/content/browser.xhtml
@@ -31,7 +31,7 @@
         retargetdocumentfocus="urlbar-input"
         scrolling="false"
         persist="screenX screenY width height sizemode"
-        data-l10n-sync="true">
+        data-l10n-sync="true"
         firefoxviewhidden="true">
 <head>
   <!-- The "global.css" stylesheet is imported first to allow other stylesheets to
