As I mentioned in another comment, Mozilla stopped developing updates back in 2012 and passed it to the community. I imagine the maintenance will move likewise.<p>If you&#x27;re upset about decisions that have been made with Thunderbird, submit a pull request.<p>Here&#x27;s the code: <a href="https:&#x2F;&#x2F;hg.mozilla.org&#x2F;comm-central" rel="nofollow">https:&#x2F;&#x2F;hg.mozilla.org&#x2F;comm-central</a>