How to hide address bar (Navigation bar) for Firefox v29.0?

I've been using Vimperator in Firefox for a long time. I'd like to hide or remove the address bar to get a bigger main window. However, after update to v29.0, the address bar cannot be hidden or removed. How can I do that? Or which add-in can help?

Here is the screenshot of my older version (before v29.0); you can see the address bar has been hidden:

Firefox screenshot

Solution

What you want is :set gui=nonavigation. See http://code.google.com/p/vimperator-labs/issues/detail?id=943