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("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

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


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

Please see here

Many thanks