<a href="https:&#x2F;&#x2F;www.mozilla.org&#x2F;en-US&#x2F;firefox&#x2F;organizations&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.mozilla.org&#x2F;en-US&#x2F;firefox&#x2F;organizations&#x2F;</a><p>Extended Support Release<p>They&#x27;re released on a much slower schedule (once a year) and get security fixes backported. They&#x27;re intended for big organizations that don&#x27;t want 6-weekly updates and are willing to live with outdated software.<p>But obviously its also handy if you want to fork and can&#x27;t deal with re-basing every 6 weeks. Especially if you don&#x27;t intend to update your fork a lot. You still get the free security fixes.