Collects all preferences related to privacy and security. I wish firefox would offer such a compilation in its Preferences / Privacy section, e.g., as "Advanced Settings". Very convenient: For each preference, this add-on provides information on its meaning, partially complemented by web links. I agree with some reviewers that an import/export facility and switchable profiles would be nice. As a not so handy substitute, I currently fiddle with prefs.js (comprising _all_ firefox preferences) in the profile directory when I have to check why a certain website no longer works.
Thanks a lot!