Classic Theme Restorer Add-on
I refused to 'upgrade' for the same reason so was stuck on v28.0. Then something weird happened and FF upgraded to v32.03 even though I didn't have it set to. I hate the UI so went about trying to change it. This add-on put everything back just as I had it - it's brilliant.
https://addons.mozilla.org/en-US/firefox/addon/classicthemerestorer/
None of that australis nonsense for me.