I upgraded to FF6 and my google tool bar stopped working. Google is no longer supporting the toolbar past FF4 (why????)

Anyway, to make it work is pretty easy.

Go here:
1 C:\Users\[YOURNAME]\AppData\Roaming\Mozilla\Firefox\Profiles\[RANDOM NUMBERS/TEXT]
2 Search install.rdf, will return several results.
3 Find the install.rdf that has Google Toolbar for Firefox in it.
4 Edit that file and change maxversion from 4.* to 6.*
5 Save, and restart firefox.

And your tool bar should be back! Note, assuming the Google tool bar was installed on FF4.