"The Ghacks user.js list covering the majority of privacy and security configuration options for the Firefox web browser has been updated.
"... please remember that this is my user.js as it is today. I do not expect or want anyone to just run with it. You should know what you are doing. That said, I have kept the warning list at the top up to date, but I will never catch everything for everybody. This list is meant to be a TEMPLATE, please treat it as such. ..."

Source: gHacks Tech News
 The most comprehensive Firefox user.js has been updated