I am using portable -"browser in the pocket" FF-Candiate1.x (:)-!!)

http://portableapps.com/apps/internet/browsers/portable_firefox

some of these grease monkey scripts are NOT portable ..

I prefer the much more powerful Customize Google extension. Availabe also for older and more stable Firefox versions:
http://www.customizegoogle.com/

The Customize Google extension doesn't do anything to the Google menu tabs.

Kamambe now supports Opera, and has tabs to search other search engines.