diff --git a/common/content/io.js b/common/content/io.js
index d9e5d1c3..e3ba52a0 100644
--- a/common/content/io.js
+++ b/common/content/io.js
@@ -141,6 +141,9 @@ function IO() //{{{
     downloadManager.addListener(downloadListener);
     liberator.registerObserver("shutdown", function () {
         downloadManager.removeListener(downloadListener);
+        for (let [, plugin] in Iterator(plugins.contexts))
+            if (plugin.onUnload)
+                plugin.onUnload();
     });
 
     /////////////////////////////////////////////////////////////////////////////}}}
diff --git a/common/modules/storage.jsm b/common/modules/storage.jsm
old mode 100755
new mode 100644
diff --git a/muttator/content/mail.js b/muttator/content/mail.js
old mode 100755
new mode 100644