THIS ADDON IS NO LONGER BEING MAINTAINED: With the (imminent) release of Firefox's new "Australis" design, I believe the Firefox interface will have changed so drastically to be very minimalistic that it will no longer be feasible to mod Firefox back to look and behave the way it used to.  This new Firefox design will also force a tabs-on-top layout, with no option to change it back.

For this reason, if you want to retain the Firefox 3-style experience (extensive browser chrome / tabs-on-bottom / fully functional status bar / etc.), I recommend you now switch to using SeaMonkey as your browser and install my Firefox 3 for SeaMonkey theme, and my MonkeyFix extension.

See my page on Firefox/SeaMonkey extensions for a fuller explanation: http://gooeysoftware.com/mozaddons