The recently released Thunderbird version 60 also includes important security updates alongside new design, improved attachment management, and advanced calendaring features. This is especially worth mentioning because the new version is initially not distributed via the automatic update function: the change requires a manual download. Those who continue to use the latest stable 52.x version will run the risk of a total of 15 security holes. In their Security Advisory, the Thunderbird developers describe five of them as critical: they can be exploited by attackers to cause program crashes and in the worst case execute arbitrary code. In view of the potential dangers users should change: Mozilla Thunderbird 60 is available for download at thunderbird.net.