diff --git a/browser/base/content/tabbrowser.xml b/browser/base/content/tabbrowser.xml
index a81984c138e..9444b5f6b18 100644
--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -2355,7 +2355,7 @@
 
   <binding id="tabbrowser-tab" display="xul:box"
            extends="chrome://global/content/bindings/tabbox.xml#tab">
-    <content chromedir="&locale.dir;" mousethrough="always"
+    <content chromedir="&locale.dir;"
              closetabtext="&closeTab.label;">
       <xul:hbox class="tab-middle box-inherit" xbl:inherits="align,dir,pack,orient,selected" flex="1">
         <xul:image class="tab-icon" xbl:inherits="validate,src=image"/>