Nightly releases of Firefox 4 now include Aero Glass for Windows Vista and Windows 7 users, with the feature still a work in progress.
“The feature was available first in early April but pulled back soon after to iron some important bugs” noted Mozilla Links Percy Cabello.
The above screenshot also showcases the ability to hide the menu bar, and move the tab bar above the location bar.
Keen users can test the new interface by downloading a copy of the latest Firefox nightly.