diff --git a/browser/app/blocklist.xml b/browser/app/blocklist.xml
index 8af9c7df1c7..72be0e3b123 100644
--- a/browser/app/blocklist.xml
+++ b/browser/app/blocklist.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<blocklist xmlns="http://www.mozilla.org/2006/addons-blocklist" lastupdate="1345147390000">
+<blocklist xmlns="http://www.mozilla.org/2006/addons-blocklist" lastupdate="1345657032000">
   <emItems>
       <emItem  blockID="i58" id="webmaster@buzzzzvideos.info">
                         <versionRange  minVersion="0" maxVersion="*">
@@ -439,6 +439,9 @@
       <pluginItem  blockID="p123">
                   <match name="filename" exp="JavaPlugin2_NPAPI\.plugin" />                      <versionRange  minVersion="0" maxVersion="14.2.0" severity="1"></versionRange>
                   </pluginItem>
+      <pluginItem  blockID="p129">
+                  <match name="filename" exp="Silverlight\.plugin" />                      <versionRange  minVersion="0" maxVersion="5.0.99999" severity="1"></versionRange>
+                  </pluginItem>
     </pluginItems>
 
   <gfxItems>