NSPR_LOG_MODULES="UrlClassifierDbService:5,nsChannelClassifier:5"
To produce the "digest256" hash that <tt>sbdbdump -v</tt> will contain for <tt>example.com</tt>:
echo -n "example.com/" | sha256sum
7fc983ea552f7c8d153fc308d621eb4f52e84aa63ecccf3a735698a11a2a4a8d
== UX ==