Autohide the Bookmarks Toolbar in Firefox 3

For those who use the Bookmarks Toolbar, especially if in multiple lines, the following code is really useful to get the toolbar out of the way when not needed.

I use this together with the Extension Autohide

I came across this code here

@namespace url("");

/* Auto-hide bookmarks toolbar */
visibility: collapse !important;

#navigator-toolbox:hover > #PersonalToolbar
visibility: visible !important;

After all that I have discovered that there is a Firefox Extension which does the same thing..

Please see here

Many thanks