Länk - Windmill: "No default or local profile has been set"
This worked for me in ~/.windmill/prefs.py on Ubuntu 10.10 .
MOZILLA_BINARY='/usr/bin/firefox'
MOZILLA_DEFAULT_PROFILE='~/.mozilla/firefox/'
Read more: #72: FF4 - Exception: No default or local profile has been set. - Issues - windmill/windmill - GitHub