Not really a Firefox support question. Newsgroups are related to communication via email to groups of subscribers. And it's not as popular as it was 15 years ago, when "forums" came into play for communication thru web browsers. http://kb.mozillazine.org/Thunderbird_:_FAQs_:_Newsgroups http://ilias.ca/moznewsgroups-tb https://en.wikipedia.org/wiki/Mozilla_Mail_%26_Newsgroups