There aren&#x27;t many serious alternatives to Thunderbird. I think that the project falls squarely within Mozilla&#x27;s mission statement: <a href="https:&#x2F;&#x2F;www.mozilla.org&#x2F;en-US&#x2F;about&#x2F;manifesto&#x2F;details&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.mozilla.org&#x2F;en-US&#x2F;about&#x2F;manifesto&#x2F;details&#x2F;</a><p>Most of their reasoning about this decision revolves around it being a distraction from Firefox. Maybe they should update the manifesto to put web browsing as goal #1. As it stands, it talks about the Internet, but the WWW is clearly their priority.