Alas, mine did not. I ran the 1.0.2 install and it wiped out the previous 1.00 version. It even brought up a window before starting the new version that stated, "Any extensions or themes you had installed in your old version have been disabled."
Not only were they disabled, I could not re-enable them or get them to work by uninstalling and re-installing any of them.
I have upgraded Firefox for the last time. I will stay at 1.0.0 forever. Until they can come out with a true, non-invasive upgrade procedure.
Sam,
Did you run the update or did you download and install a new executable?