Border around main page content missing

[gazecube]

So, I'm on Windows 7, and old versions of FF have a border around the main content to highlight the page when Aero is applied. I can't find any setting to restore this behaviour. Is there any way to get the border back?

FF18:

FF111 with userstyle applied:

[Aris-t2]

You can add a border using this:

#appcontent {
  border: 1px solid grey !important;
}

[gazecube]

Would it also be possible to get that border on the side of the location bar?

[Aris-t2]

Sure:

#nav-bar {
  border-left: 1px solid grey !important;
  border-right: 1px solid grey !important;
}