Mozilla: Undefined behavior in <code>ShutdownObserver()</code>

The Mozilla Foundation Security Advisory describes this flaw as: The ShutdownObserver was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor...

UBUNTU-CVE-2023-6863

The ShutdownObserver was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR 115.6, Thunderbird 115.6, and Firefox 121...