The updated packages fix security issues:
Use-after-free when creating index updates in IndexedDB. (CVE-2019-11757)
Potentially exploitable crash due to 360 Total Security. (CVE-2019-11758)
Stack buffer overflow in HKDF output. (CVE-2019-11759)
Stack buffer overflow in WebRTC networking. (CVE-2019-11760)
Unintended access to a privileged JSONView object. (CVE-2019-11761)
document.domain-based origin isolation has same-origin-property violation. (CVE-2019-11762)
Incorrect HTML parsing results in XSS bypass technique. (CVE-2019-11763)
Memory safety bugs fixed in Thunderbird 68.2. (CVE-2019-11764)
Heap overflow in expat library in XML_GetCurrentLineNumber. (CVE-2019-15903)
Enigmail has been updated to 2.1.3.