Not so long ago, Habré wrote about future versions of FireFox and their updated appearance, which includes support for Aero effects:

But many do not know that this appearance can be implemented in already released versions.
Option 1:We install the StrataGlass add-
on , which includes support for Aero at the browser panels and the specially designed Strata40 theme (the same as in the screenshot).
To hide the menu bar, you can use
HideMenuBar or a more flexible
Personal Menu (allows you to add Tools buttons, etc.).
Option 2: (from timon_sk)
Classic Remix for Windows 7 +
All Glasser Addon +
Personal Menu
')
Option 3 (for lovers of the default browser theme): (from Nexux)
New Glasser - this add-on provides support
for a large number of topics (but unfortunately most of the themes provide a background for the panels and, therefore, Aero doesn’t have any under them). Works well with a standard theme. (the screenshot shows the appearance with the included
Personal Menu )
Option 4: (from Fiery_Ice)
AeroFX - not very “harmoniously” displays themes (even standard ones), but, on the other hand, there are not so many conflicts with other add-ons.
PS Works, of course, only on Windows Vista / 7.