I don't know if this will help;

CCK2 Wizard {web link} Need to customize Firefox? With the CCK2 Wizard, you can create custom Firefox configurations that can be installed as extensions or deployed with AutoConfig.

Note that this shortcut normally opens the Bookmarks/History Manager (Library) with the Downloads folder selected. The Library can be accessed in many ways and there is also the about:downloads page that can be opened via the location bar. So I'm not sure what the reason is for disabling this keyboard shortcut.

Hi,

I've explored the CCK2 wizard extensionally. It doesn't suit our needs as it is a pretty bloated way of achieving the exact same thing we've done in our policies.

You are correct that the shortcut opens the Library view instead of directly to a downloads view.

We did not provide a reason for this to be disabled only that it should be. We have an application that is being interfered with by this combination.

If you want to change the shortcut keys;

Customizable Shortcuts {web link} Allows to customize Firefox shortcuts.

Go to the Mozilla Add-ons Web Page {web link} (There’s a lot of good stuff here)

You could opt for a simple extension that disables this shortcut key.

<?xml version="1.0"?>

<overlay id="keydisable-overlay" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

<script type="text/javascript">
<![CDATA[
var E = window.document.getElementById("key_openDownloads");
if (E) {
  E.removeAttribute("key");
  E.removeAttribute("modifiers");
  E.removeAttribute("command");
}
]]></script>

</overlay>

• http://mike.kaply.com/2012/02/09/integrating-add-ons-into-firefox/
• http://mike.kaply.com/2013/02/11/add-ons-in-the-distribution-directory/
• http://mike.kaply.com/2013/04/24/major-changes-coming-in-firefox-21/