Thunderbird usage continues to grow, almost reaching 10M users:<p><a href="https:&#x2F;&#x2F;blog.mozilla.org&#x2F;thunderbird&#x2F;2015&#x2F;02&#x2F;thunderbird-usage-continues-to-grow&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blog.mozilla.org&#x2F;thunderbird&#x2F;2015&#x2F;02&#x2F;thunderbird-usa...</a>